Unverified50% confidenceFactExact time
密码学哈希函数（如SHA-256）具有确定性和不可预测性，使检测方能精确重现绿/红名单划分而第三方无法伪造水印
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50%
Confidence
Long-term
Relevance
8/24/2026
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Related Claims
Unverified水印方案在开源模型上彻底失效的根本原因之一是哈希密钥无法保密，一旦绿/红名单划分规则被逆向推断，攻击者可主动规避绿名单词汇66% similarUnverifiedSHA-256 is a cryptographic hash function in the SHA-2 family with an output length of 256 bits, possessing collision resistance and preimage resistance.64% similarUnverified数字签名工程实现中通常先计算消息的密码学哈希（如 SHA-256）再对哈希值签名，因为非对称加密运算开销远大于哈希运算62% similarUnverifiedCommit SHA 基于 SHA-1 的内容寻址特性，具备密码学层面的完整性保证，即便标签被恶意篡改，锁定 SHA 的工作流也不会受影响，Git 正逐步向 SHA-256 迁移60% similar
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