System for encryption of partitioned data blocks utilizing publi

Details System for encryption of partitioned data blocks utilizing publi System for encryption of partitioned data blocks utilizing publi

1998-02-25

1999-10-26

Hayes, Gail O.

Cryptography

Key management

Having particular key generator

380 37, H04N 7167

Patent

active

059741449

ABSTRACT:
A method for encryption wide-bandwidth video, using a first processor for encrypting the video and a second processor for decrypting the video. Data is taken in blocks. A block of data is scrambled to generate scrambled data, then partitioned into a first portion and a second portion. A global key is generated at the first processor and the second processor, using public key technology. At the first processor, the global key is exclusively-ORed with the first portion, thereby generating a encrypted second portion. At the first processor, a random number is generated from the first portion and exclusively-ORed with the second portion to generate an encrypted second portion. At the second processor, the global key is exclusively-ORed with the encrypted first portion. At the second processor, the random number is recovered from the decrypted first portion and exclusively-ORed with the encrypted second portion to decrypt it. The scrambled data are descrambled, thereby recovering the data.

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