Information processing apparatus with a software protecting func

Details Information processing apparatus with a software protecting func Information processing apparatus with a software protecting func

1997-01-27

1999-11-30

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 28, 380 42, 380 44, H04L 900, H04L 916, H04K 110

Patent

active

059956232

ABSTRACT:
The present invention provides an information processing apparatus which comprises separating means for separating inputted data into identification data and data to be encrypted, determination means for determining an encryption method specified by a combination of an encryption key and an encryption algorithm in accordance with the identification data separated by the separating means, encryption means for encrypting the data to be encrypted by utilizing the encryption method determined by the determination means and generating encrypted data having the number of bits same as that of the data to be encrypted, and locating means for locating the identification data showing the encryption method used for encrypting the data to be encrypted in a predetermined position in the encrypted data.

REFERENCES:
patent: 5696823 (1997-12-01), Blaze
patent: 5757915 (1998-05-01), Aucsmith et al.
patent: 5764774 (1998-06-01), Liu
patent: 5812663 (1998-09-01), Akiyama et al.
patent: 5832083 (1998-11-01), Iwayama et al.
patent: 5835597 (1998-11-01), Coppersmith et al.
patent: 5835601 (1998-11-01), Shimbo et al.
patent: 5860099 (1999-01-01), Milios et al.

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