One of the things that amazes me about symmetric encryption modes is that a bad symmetric proof almost always leads to a real attack.pic.twitter.com/BUjp6FyDjb
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The OCB2 scheme was proposed in 2004. Standardized in 2009. Nothing much happens. In September 2018 someone found a flaw in the proof. By November 12, 2018 they had full plaintext recovery. “Attacks always get better”, sometimes fast.pic.twitter.com/CoDPCCjELo
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that escalated quickly
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