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Duplicate Signature Key Selection Attack in Let's Encrypt

Comment by Reader Rena

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I feel like I'm missing something here. An attacker can craft a private key P and a message M, such that the signature of M signed with P is the same as the signature of some other message signed with some other private key? But what good does this do them? The signature of that other message won't be correct for their new message?

| Posted on 2015-12-13 at 03:31:40 UTC by Reader Rena | Reply to This

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