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A comment on Maybe we shouldn't skip SHA-3. Parent comment

Re:Maybe we shouldn't skip SHA-3 by kobeya on Friday June 02, 2017 @10:51AM (#14470296)
There are two forms of length extension, one where the attacker does know those bits. SHA-512/256 doesn't protect against that. (HMAC does, I believe.)
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Re:Maybe we shouldn't skip SHA-3 by tptacek on Friday June 02, 2017 @10:52AM (#14470305)
No.
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