Encryptor, encrypting method, decryptor, decrypting method,...

Details Encryptor, encrypting method, decryptor, decrypting method,... Encryptor, encrypting method, decryptor, decrypting method,...

H - Electricity

04

L

H04L 9/10 (2006.01)

Patent

CA 2496539

An encrypting apparatus encrypts plaintext data including at least one plaintext block data into ciphertext data. The encrypting apparatus comprises: an encrypting unit, having a first feedback loop for feeding back ciphertext block data C i output by the encrypting unit to the encrypting unit when the plaintext block data is encrypted by the encrypting unit, for inputting the plaintext data, performing an encrypting process by feeding back the ciphertext block data C i through the first feedback loop, and outputting the ciphertext block data; a message authentication code (MAC) generator, having a second feedback loop for feeding back a computed intermediate MAC result, for inputting the ciphertext block data whenever the ciphertext block data is output from the encrypting unit, processing data, feeding back the computed intermediate MAC result by the second feedback loop, and generating the MAC to ensure the integrity of the ciphertext data.

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