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Hacker News · 首页· Retr0id·· 2026-10-04AI 评分15

如何用 C2PA 篡改时间:签名可排除任意字节区间

How to hack time, with C2PA

AI 导读

Hacker News 用户 bawolff 指出,C2PA 允许在文件中设置任意"排除区"(exclusions),即从签名计算中剔除特定字节区间,从而可被用来篡改时间等元数据。他评论称,这说明业界已从 SAML 的设计失误中吸取了教训。

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bawolff 6 minutes ago [–]


> C2PA allows for arbitrary "exclusions". These are byte ranges within the file which are excluded from signature calculations

Glad to see we learned from the mistakes of SAML.

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来源:Hacker News · 首页 · news.ycombinator.com