Configuration stream encryption

Details Configuration stream encryption Configuration stream encryption

1996-08-26

1999-10-19

Hayes, Gail O.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 48, 380 4, H04L 900

Patent

active

059701420

ABSTRACT:
A method of communicating encrypted configuration data between a programmable logic device (PLD) and a storage device is included in one part of the invention. The method includes the following steps. Transmit encrypted configuration data stored in a storage device to the PLD. Decrypt the encrypted configuration data to generate a copy of the configuration data in the PLD. Configure the PLD using the copy of the configuration data. In one embodiment, the PLD transmits a key to the storage device. In another embodiment the key is separately entered into the storage device and the PLD and never transmitted between the PLD and the storage device. In another embodiment, the key is entered only into the PLD. The key is used to encrypt the configuration data.

REFERENCES:
patent: 5081675 (1992-01-01), Kittirutsunetorn
patent: 5349249 (1994-09-01), Chiang et al.
patent: 5388157 (1995-02-01), Austin
patent: 5406627 (1995-04-01), Thompson et al.
patent: 5748734 (1998-05-01), Mizikovsky
"The Programmable Logic Data Book," pp. 2-25 through 2-46, Xilinx, 1994, San Jose, California.
Datasheet for the XC5200 FPGA from Xilinx.

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