Information processing apparatus

Details Information processing apparatus Information processing apparatus

2006-07-25

2006-07-25

Moise, Emmanuel L. (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

C713S152000

Reexamination Certificate

active

07082539

ABSTRACT:
Since a conventional information processing apparatus includes a plurality of semiconductor devices, there is a problem that sensitive information may reside on a system bus in the apparatus or a semiconductor memory device serving as main memory therein. To obviate this problem, each information processing apparatus has a CPU which includes a microprocessor, a cryptographic processing algorithm ROM, a cryptographic processing hardware circuit, a RAM, a key custody area, and an external bus controller, which are all integrated on a single semiconductor chip. Thus, encryption/decryption processing is carried out only in the CPU, and internal operations of the CPU are made non-analyzable from an external signal of the CPU.

REFERENCES:
patent: 5111504 (1992-05-01), Esserman et al.
patent: 5224166 (1993-06-01), Hartman, Jr.
patent: 5512977 (1996-04-01), Imai
patent: 5535168 (1996-07-01), Yepez et al.
patent: 5592549 (1997-01-01), Nagel et al.
patent: 5748744 (1998-05-01), Levy et al.
patent: 5805712 (1998-09-01), Davis
patent: 5892974 (1999-04-01), Koizumi et al.
patent: 5909700 (1999-06-01), Bitner et al.
patent: 5933500 (1999-08-01), Blatter et al.
patent: 5990873 (1999-11-01), Yamamoto et al.
patent: 5999629 (1999-12-01), Heer et al.
patent: 6292899 (2001-09-01), McBride
patent: 6473861 (2002-10-01), Stokes
patent: 6571263 (2003-05-01), Nagai
patent: 2001/0042043 (2001-11-01), Shear et al.
patent: 2003/0158754 (2003-08-01), Elkind
patent: 64-041947 (1989-02-01), None
patent: 2-297626 (1990-12-01), None
patent: 4-149652 (1992-05-01), None
patent: 04-163768 (1992-06-01), None
patent: 05-53921 (1993-03-01), None
patent: 5-314014 (1993-11-01), None
patent: 9-044407 (1997-02-01), None
patent: 10-214233 (1998-08-01), None
patent: 10-275115 (1998-10-01), None

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