Trivium

By: on August 15, 2005

Of the many new ciphers proposed as part of the ECRYPT Stream Cipher Project, one of the most interesting is Christophe De Cannière and Bart Preneel’s TRIVIUM. TRIVIUM is designed to be very simple, admit a very low gate count implementation in hardware, and be reasonably efficient in both hardware and software, parallelizing in a straightforward way for fast hardware implementations and admitting of a straightforward bitslice implementation in software.

Today’s tip: I now think that the fastest way to write a software implementation for x86 is to store the inverses of the register contents, rather than the register contents themselves. Super bonus points for anyone who can figure out why.

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