File encryption method and file cryptographic system

Details File encryption method and file cryptographic system File encryption method and file cryptographic system

1991-03-12

1993-08-10

Swann, Tod

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 3, 380 49, H04L 902

Patent

active

052356418

ABSTRACT:
In an information processing system having an upper rank apparatus and an external storage device which performs transmission and reception of data between the storage device and the upper rank apparatus, at least one of encryption and decryption of the data by use of an algorithm controlled by a desired data key is performed in the external storage device, while generation, encryption and decryption of the data key are performed on the upper rank apparatus side. By this configuration, the burden of the upper rank apparatus is largely reduced and the secrecy of data stored in the external storage device can be surely kept without spoiling the throughput of the whole system.

REFERENCES:
patent: 4078152 (1978-03-01), Tuckerman, III
patent: 4203166 (1980-05-01), Ehrsam et al.
patent: 4238853 (1980-12-01), Ehrsam et al.
patent: 4262329 (1981-04-01), Bright et al.
patent: 4352952 (1982-10-01), Boone et al.
patent: 4608456 (1986-08-01), Paik et al.
patent: 5081675 (1992-01-01), Kittirutsunetorn

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