On Mar 27, 2013, at 3:50 AM, Jeffrey Walton <noloa...@gmail.com> wrote:
> What is the reason for checksumming symmetric keys in ciphers like BATON? > > Are symmetric keys distributed with the checksum acting as a > authentication tag? Are symmetric keys pre-tested for resilience > against, for example, chosen ciphertext and related key attacks? > The parity bits in DES were explicitly intended to guard against ordinary transmission and memory errors. Note, though, that this was in 1976, when such precautions were common. DES was intended to be implemented in dedicated hardware, so a communications path was needed, and hence error-checking was a really good idea. --Steve Bellovin, https://www.cs.columbia.edu/~smb _______________________________________________ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography