Data encryption in an electronic apparatus with several symmetrical processors

摘要

The method involves selecting a secret key from keys stored with key identifiers in registers. Data is divided into a stream of data words of determined size. A pseudo-random number is generated based on the secret key and an initialization vector. The data word and number are combined to generate an encrypted data word and the encrypted data word is stored with the vector and the identifier of the key in an external memory (23). Independent claims are also included for the following: (A) a device for implementing a data encrypting method (B) an electronic apparatus having processors with encrypting/decrypting unit.