We have computed the very first chosen-prefix collision for SHA-1. To put it in another way: all attacks that are practical on MD5 are now also practical on SHA-1.
We have reduced the cost of a collision attack from 2^64.7 to 2^61.2, and the cost of a chosen-prefix collision attack from 2^67.1 to 2^63.4.
Demo: The legacy branch of GnuPG (version 1.4) is vulnerable. We have created two PGP keys with different UserIDs and colliding certificates.
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Fascism:
When you don't let people abuse your kids.
LukeAlmighty DO NOT have any pronouns. You can only refer to LukeAlmighty by LukeAlmighty's name. Please, be tolerant of this.
Please be patient, LukeAlmighty have autism
🇨🇿
I you are in Czech republic, DM me, I'll be happy to grab a beer with you
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