Introducing the SEA S-Box: A High-Quality Substitution Box via Fractional Linear and Affine Transformations In symmetric cryptography, the substitution box (S-box) is the primary source of nonlinear confusion in block ciphers. The security of ciphers like AES depends critically on […]
Introductory Material It was brought to my attention recently that the Apple publishes the details of their security protocols online (which is pretty cool of them), so I took the opportunity to do a somewhat rudimentary review of the iMessage […]
Today (February 23, 2017), Google announced the first known collision in SHA-1. They’ve posted two PDF files (which I’ve re-uploaded here and here) that both hash to the same value (38762cf7f55934b34d179ae6a4c80cadccbb7f0a). What does this mean? In short – the collision […]