] There's a rumor circulating at the Crypto conference,
] which is being held this week in Santa Barbara, that
] somebody is about to announce a partial break of the
] SHA-1 cryptographic hashfunction. If true, this will have
] a big impact, as I'll describe below. And if it's not
] true, it will have helped me trick you into learning a
] little bit about cryptography. So read on....