Got more of the logo
#realworldcryptopic.twitter.com/Ka2XtQURbI
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Result: authenticity attack on OCB2, not related to the underlying block cipher.
#realworldcryptopic.twitter.com/nRbwCXsRyi
> SJCL affected
Free corgi pix to someone who collects metrics on real world usage of the SJCL in the wild.
#realworldcrypto
If we encrypt the same message twice, the nonce will* be different and the ciphertext will be different.
* CAVEAT EMPTOR
#realworldcrypto
Simplest attack is a minimal forgery (existential forgery), adversary must know content of the message, it might not be that important but it's still not generated by the original sender.
#realworldcryptopic.twitter.com/X1ibibpXF3
On its own may not mean much, but can be leveraged into more powerful attacks.
#realworldcrypto
Universal forgery: for any nonce and message (possibly chosen by the adversary), can compute ciphertext and tag that will be accepted as legit
#realworldcrypto
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