On the off chance that anyone here isn't familiar with 'cryptbe, he broke the Flickr URL signing scheme, he and Juliano Rizzo discovered and worked out the BEAST TLS attack (which, to hear Kenny Paterson describe it, more or less set the template for the next 10 years of applied TLS attack research), and then discovered CRIME, which is the first in a line of compression oracle attacks. He works on Daniel Bleichenbacher's team now doing Tink and and Wycheproof.