Adjustment value equipped block encryption device and adjustment value equipped block encryption mannered and adjustment value equipped block encryption program and adjustment value equipped block decoding device, adjustment value equipped block decoding manner and adjustment value equipped block decoding program

摘要

The adjustment value equipped block encryption device, encrypts the clear text of the n bit and entry means and the aforementioned adjustment value which input the adjustment value of the n bit with n bit block cryptography function, locks the optional n m bit among results which are encrypted to be larger than 1 the value under n/2 as m, in optional value, generating mask value with the adjustment value dependence key guidance means which are generated and inputting aforementioned adjustment value to key equipped function the result of locking, by encrypting with the cryptography treatment which has the entry of the n bit, the adjustment value dependence keyIt does, adds the said mask value to the aforementioned aforementioned clear text, it encrypts the result which was added, in the n bit block cryptography which designates the aforementioned adjustment value dependence key as the key, the mask equipped block encryption means which generate cryptogram by adding aforementioned mask value to the result which is encrypted and the output means which output aforementioned cryptogram and, it possesses.