Encryption apparatus and method capable of controlling...

Details Encryption apparatus and method capable of controlling... Encryption apparatus and method capable of controlling...

H - Electricity

04

L

H04L 9/28 (2006.01) H04L 9/06 (2006.01)

Patent

CA 2173688

An encryption apparatus is constituted by a plurality of rungs of round functions. Each round function comprises internal state storing means for storing an internal state, internal state updating means for updating the internal state stored in the storing means, and an F-function for executing an encryption upon receipt of data to be encrypted, an encryption key, and the internal state stored in the internal state storing means. The internal state stored in the internal state storing means is updated by the internal state updating means every time the encryption is executed by the F-function.

Dispositif de cryptage constitué d'un certain nombre d'échelons de fonctions circulaires. Chaque fonction circulaire comprend des moyens de mémoriser un état interne, des moyens de mettre à jour l'état interne mémorisé, et une fonction F pour exécuter un cryptage sur réception des données à coder, une clé de cryptage, et l'état interne mémorisé. L'état interne mémorisé est mis à jour par le moyen de mise à jour d'état interne chaque fois que la fonction F exécute le cryptage.

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