System and method for sign mask encryption and decryption

Details System and method for sign mask encryption and decryption System and method for sign mask encryption and decryption

2006-09-05

2006-09-05

Barron, Jr., Gilberto (Department: 2132)

Cryptography

Video cryptography

Video electric signal masking

C380S206000, C380S210000

Reexamination Certificate

active

07103184

ABSTRACT:
In general, one embodiment of the invention involves a method to protect the integrity of the sign mask. The method involves computing a key shared by a plurality of software modules employed within an image display device and encrypting a sign mask with the shared key. The sign mask is used for scrambling a bit stream prior to its transmission along with the encrypted sign mask. The encrypted sign mask is decrypted at the destination in order to descramble the scrambled bit stream.

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Stallings, William. “Public-Key Cryptography and RSA.” Cryptography and Network Security- Principles and Practices. Upper Saddle River, NJ: Prentice Hall, 2003. 268-278.

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