config CRYPTO_SKEIN tristate "Skein digest algorithm" depends on (X86 || UML_X86) && 64BIT && CRYPTO select CRYPTO_HASH select CRYPTO_ALGAPI help Skein secure hash algorithm is one of 5 finalists from the NIST SHA3 competition. Skein is optimized for modern, 64bit processors and is highly customizable. See: http://www.skein-hash.info/sites/default/files/skein1.3.pdf for more information. This module also contains the threefish block cipher algorithm.