Method and apparatus for enhancing security in and discouraging

Details Method and apparatus for enhancing security in and discouraging Method and apparatus for enhancing security in and discouraging

1996-03-28

1998-06-30

Cangialosi, Salvatore

Cryptography

Cryptanalysis

380 23, H04L 900

Patent

active

057745455

ABSTRACT:
VLSI and ULSI devices like microprocessors and DRAM devices are prone to large scale theft from factories and warehouses. A proposed method of reducing the theft incorporates a small amount of non-volatile flash memory in these devices. The flash memory contains password, device serial number and user identification information. On power-up, the device initiates an encrypted password verification session through a standard interface. If the user supplied password fails, the device's operational ports (any data or control output buses) are tri-stated, thus making the device unusable. The device serial number and user identification information are useful in determining ownership of stolen devices when recovered.

REFERENCES:
patent: 4926480 (1990-05-01), Chaum
patent: 5581503 (1996-12-01), Matsubara et al.

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