界: Security Features
ソフトウェアのセキュリティは、セキュリティ ソフトウェアではありません。ここでは、認証、アクセス制御、機密性、暗号化、権限管理などのトピックについて説明します。
Weak Cryptographic Signature: Insufficient Key Size
Abstract
強力な暗号化署名アルゴリズムでも、不十分な鍵サイズを使用する場合は、Brute-Force 攻撃に対してさらに脆弱性が増す可能性があります。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用する必要があるとされています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
...
DSA dsa = new DSACryptoServiceProvider(1024);
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.dotnet.weak_cryptographic_signature_insufficient_key_size
Abstract
強力な暗号化署名アルゴリズムでも、不十分な鍵サイズを使用する場合は、Brute-Force 攻撃に対してさらに脆弱性が増す可能性があります。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用する必要があるとされています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
...
DSA_generate_parameters_ex(dsa, 1024, NULL, 0, NULL, NULL, NULL);
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.cpp.weak_cryptographic_signature_insufficient_key_size
Abstract
強力な暗号化署名アルゴリズムでも、不十分な鍵サイズを使用する場合は、Brute-Force 攻撃に対してさらに脆弱性が増します。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用するように推奨されています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
...
dsa.GenerateParameters(params, rand.Reader, dsa.L1024N160)
privatekey := new(dsa.PrivateKey)
privatekey.PublicKey.Parameters = *params
dsa.GenerateKey(privatekey, rand.Reader)
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.golang.weak_cryptographic_signature_insufficient_key_size
Abstract
暗号化署名アルゴリズムでも、鍵のサイズが不十分であると、ブルートフォース攻撃に対して脆弱になります。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用するように推奨されています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
...
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA", "SUN");
SecureRandom random = SecureRandom.getInstance("SHA256PRNG", "SUN");
keyGen.initialize(1024, random);
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.java.weak_cryptographic_signature_insufficient_key_size
Abstract
強力な暗号化署名アルゴリズムでも、不十分な鍵サイズを使用する場合は、Brute-Force 攻撃に対してさらに脆弱性が増す可能性があります。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用する必要があるとされています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
...
from Crypto.PublicKey import DSA
key = DSA.generate(1024)
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.python.weak_cryptographic_signature_insufficient_key_size
Abstract
強力な暗号化署名アルゴリズムでも、不十分な鍵サイズを使用する場合は、Brute-Force 攻撃に対してさらに脆弱性が増す可能性があります。
Explanation
現在の暗号化ガイドラインでは、RSA と DSA アルゴリズムでは最小でも 2048 ビットの鍵の長さを使用する必要があるとされています。しかし、演算処理能力とファクタリング技術が進歩し続ける限り [1]、将来的に推奨される鍵のサイズが増大するのは避けられません。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
例 1: 次のコードは、1024 ビットの DSA 署名鍵を生成します。
require 'openssl'
...
key = OpenSSL::PKey::DSA.new(1024)
...
References
[1] J. Cheng 307-digit key crack endangers 1024-bit RSA
[2] Elaine Barker and Allen Roginsky NIST Special Publication 800-131A: Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths. NIST
[3] B. Chess and J. West, Secure Programming with Static Analysis. Boston, MA: Addison-Wesley, 2007.
[4] Standards Mapping - Common Weakness Enumeration CWE ID 326
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001188, CCI-002450
[6] Standards Mapping - FIPS200 MP
[7] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1), SC-23 Session Authenticity (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection, SC-23 Session Authenticity
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 6.2.7 Algorithms (L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[12] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[14] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[15] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[16] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[17] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[18] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[19] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.2 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002020 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002020 CAT II, APSC-DV-002290 CAT II
desc.structural.ruby.weak_cryptographic_signature_insufficient_key_size