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The Yarrow algorithm is a cryptographically secure pseudorandom number generator. The name is taken from the yarrow plant, the stalks of which are dried and used as a randomising agent in I Ching divination.
It was designed by Bruce Schneier, John Kelsey, and Niels Ferguson of Counterpane Labs (Kelsey et. al, 1999). The Yarrow algorithm is explicitly unpatented and royalty-free; no license is required to use it. Yarrow is incorporated in Mac OS X and FreeBSD for their /dev/random devices.
An improved design from Ferguson and Schneier, Fortuna, is described in their book, Practical Cryptography.
External links
- Yarrow algorithm page
- Yarrow-160: Notes on the Design and Analysis of the Yarrow Cryptographic Pseudorandom Number Generator, J. Kelsey, B. Schneier, and N. Ferguson
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- This page was last modified on 26 September 2008, at 19:12.
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