> He is right about how specific the circumstances are that give rise to Bard's CBC IV attack. Not only that, but BEAST itself was the product of a former NSA cryptologist, now a Wisconsin university math professor; it is vanishingly unlikely that it was common knowledge inside of NSA, since the guy PUBLISHED it just a year or two after leaving the agency.
I don't think BEAST was a product of Bard. If we read Bard's papers then we probably never came up with BEAST [1]. Bard wanted to apply Rogaway-Dai's attack to SSL, but he didn't understand how browsers worked. His papers didn't target cookies - in fact he didn't even mention that word - but he wanted to decrypt short PIN sent in POST requests, which is impossible as far as I can tell. The reason we cited Bard was because his English is much better than us, so we'd thought that we could re-use his explanation of Rogaway-Dai's attack in the context of SSL. In other words, we both attempted to exploit the same vulnerability, but we used different approaches and targeted different secrets.
Another way to look at this: imagine if one reads Bard's do you think if he or she could use any of Bard's ideas to invent new BEASTies attacks, e.g., CRIME, Lucky 13, the RC4 attack, <your attack here>?