travis+ml-cryptogra...@subspacefield.org wrote: > http://www.matasano.com/log/1749/typing-the-letters-a-e-s-into-your-code-youre-doing-it-wrong/ > > Towards the end of this rather offbeat blog post they describe a > rather clever attack which is possible when the application provides > error messages (i.e. is an error oracle) for PKCS7 padding in e.g. AES > CBC-encrypted web authenticators that allows an adversary to attack > the crypto one octet at a time.
I think this attack can be attributed to Klima and Rosa: Side Channel Attacks on CBC Encrypted Messages in the PKCS#7 Format. V. Klima and T. Rosa. http://eprint.iacr.org/2003/098.pdf -James
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