Method and apparatus for generating an encryption key

Details Method and apparatus for generating an encryption key Method and apparatus for generating an encryption key

H - Electricity

04

L

H04L 9/28 (2006.01) G06F 12/14 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2439969

An encryption key is formed by a method and apparatus that read a sequence of bytes from a memory (510). The sequence of bytes, which is larger than the number of bytes in the encryption key, is randomly ordered due to the source of the sequence. Each byte in the sequence is assigned to one of a number of groups where the number of groups is defined by the number of bytes in the encryption key (512). Each group is then reduced to a single byte (514) to form one of the bytes of the encryption key (516).

L'invention concerne une clé de chiffrement élaborée par un procédé et un dispositif de lecture d'une séquence binaire à partir d'une mémoire (510). La séquence binaire, qui est plus grande que le nombre de multiplets contenus dans la clé de chiffrement, est ordonnée de manière aléatoire d'après la source de la séquence. Chaque multiplet contenu dans la séquence est attribué à l'un des nombreux groupes, le nombre de groupes étant défini par le nombre de multiplets contenus dans la clé de chiffrement (512). Chaque groupe est ensuite réduit à un seul multiplet (514) afin de former l'un des multiplets de la clé de chiffrement (516).

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