Storage device having secure test process

Details Storage device having secure test process Storage device having secure test process

2006-07-11

2006-07-11

Sheikh, Ayaz (Department: 2131)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S166000, C713S182000, C713S184000, C714S718000, C714S719000, C710S001000, C710S267000, C711S163000, C711S164000

Reexamination Certificate

active

07076667

ABSTRACT:
In a storage device for maintaining information when power is OFF and being capable of executing a test process based on test signals, a test terminal inputs the test signals and an instruction part sends a read out instruction for instructing a memory storing secret data to read out data. Moreover, a decoding part decodes whether or not the data read out by the memory in response to the data reading instruction is the secret data stored in the memory and a maintaining part maintains information in a volatile state resulting from the decoding part. Furthermore, a cutting-off part cuts off the test signals input from the test terminal when the maintaining part maintains information indicating that the secret data is stored.

REFERENCES:
patent: 4521852 (1985-06-01), Guttag
patent: 5293610 (1994-03-01), Schwarz
patent: 5394367 (1995-02-01), Downs et al.
patent: 5406519 (1995-04-01), Ha
patent: 5465341 (1995-11-01), Doi et al.
patent: 6457126 (2002-09-01), Nakamura et al.

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