PROGRAMMABLE LOGIC DEVICE WITH METHOD OF PRREVENTING READBACK

It is sometimes desirable to protect a design used in a PLD from being copied. If the design is stored in a diferent device from the PLD and read into the PLD through a bitstream, the design may be encrypted as it is read into the PLD and decrypted within the PLD before being loaded into configurati...

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Bibliographic Details
Main Authors PANG, RAYMOND C, THENDEAN, JOHN M, SZE, WALTER N, TRIMBERGER, STEPHEN M, WONG, JENNIFER
Format Patent
LanguageEnglish
French
Published 06.06.2002
Edition7
Subjects
ADVERTISING
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PULSE TECHNIQUE
SEALS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:It is sometimes desirable to protect a design used in a PLD from being copied. If the design is stored in a diferent device from the PLD and read into the PLD through a bitstream, the design may be encrypted as it is read into the PLD and decrypted within the PLD before being loaded into configuration memory cells for configuring the PLD. According to the invention, in such a device, a method is provided to prevent the design from being read back from the PLD in its decrypted state if it had been encrypted when loaded into the PLD.
Bibliography:Application Number: CA20012429597