Patent ID: 7333609
Filing Date: 2008-02-19
Classification: H04L,H04W

Abstract:
1. An encrypting apparatus comprising: a central processing unit for inputting and outputting a control signal to be used for generating a random number sequence and plaintext data; an encryptor for inputting the control signal from the central processing unit and generating the random number sequence based on the control signal; a random number sequence memory for storing the random number sequence generated by the encryptor; and an operating unit for inputting the plaintext data from the central processing unit, performing an operation of the plaintext data input and the random number sequence stored in the random number sequence memory and outputting ciphertext data, wherein the central processing unit outputs the control signal before outputting the plaintext data, and the encryptor starts generation of the random number sequence before the plaintext data is input into the operating unit, and wherein the central processing unit first starts the generation of the random number sequence by the encryptor and memorization of the random number sequence by the random number sequence memory and then starts the operation of the plaintext data and the random number sequence by the operating unit, before performing the generation of the random number sequence by the encryptor, the memorization of the random number sequence by the random number sequence memory, and the operation of the plaintext data and the random number sequence by the operating unit in parallel.