Side channel attack resistant key management method based on the key encryption and shuffling method

摘要

The present invention so as to enhance the vulnerability to physical attacks of the sensor node to prevent an attacker to know the meaning Hamming distance information regarding the secret key, generated on the bus through the key management method of applying the key encryption and shuffling subchannel serves to provide a key management method that can defend the attack, in a key management method for defending the private key value stored in the sensor node processor internal flash memory from a side-channel attack, (a) a secret key that is stored in the flash memory and generation, and the generated secret key encrypting based on Goldwasser-Micali cryptosystem to, (B) shuffling map for the (shuffling) (map) specified address of the flash memory according to the order recorded in the creation and map and a shuffled the secret key value encrypted in the step of storing in the flash memory, (C) a re-shuffling (re-shuffling) and the encrypted secret key value from the encrypted secret key decrypted for use in the cryptographic operations decoding output, and the output secret key via the (a) and (B) step may comprises a step of encrypting and shuffling. ;