弱加密散列值無法保證數據完整性，且不能在安全性關鍵的上下文中使用。
MD5 和 SHA-1 是常用的加密散列算法，通常用于驗證消息和其他數據的完整性。密碼分析學中的最新發展發現這兩種算法中存在弱點。因此，不應再依賴 MD5 和 SHA-1 來驗證安全性關鍵的上下文中數據的真實性了。
破壞 MD5 散列值的技術已提高并獲得了廣泛使用，因此不能依賴于該算法來確保安全性。對于 SHA-1，目前的破壞技術仍需要極高的計算能力，因此比較難以實現。然而，攻擊者已發現了該算法的致命弱點，破壞它的技術可能會導致更快地發起攻擊。
[1] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A7 Insecure Cryptographic Storage
[2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A8 Insecure Cryptographic Storage
[3] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A8 Insecure Storage
[4] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3150.1 CAT II
[5] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3150.1 CAT II
[6] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 310
[7] Xiaoyun Wang, Yiqun Lisa Yin, and Hongbo Yu Finding Collisions in the Full SHA-1
[8] Xiaoyun Wang and Hongbo Yu How to Break MD5 and Other Hash Functions
[9] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Information Leakage
[10] Stach & Liu MD5 and MD4 Collision Generators
[11] Standards Mapping - FIPS200 - (FISMA) MP
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.3.1.3, Requirement 6.5.8
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.3
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.8
[15] SDL Development Practices Microsoft