Video scrambling apparatus and method based on space filling cur

Details Video scrambling apparatus and method based on space filling cur Video scrambling apparatus and method based on space filling cur

1990-03-19

1991-10-15

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 11, 380 20, 382 41, H04N 7167

Patent

active

050581589

ABSTRACT:
A method of encrypting a video signal employing a pseudorandom Space Filling Curve having a highly irregular scanning pattern for scanning the pixel addresses of a video picture stored in a frame buffer. The method is used with a video scrambler/descrambler device and is characterized by a much higher cryptographic strength than existing techniques, which is not subject to simple correlation attacks by comparing and matching of line portions. In addition, the method features a reduction in the video signal bandwidth for typical pictures.

REFERENCES:
patent: 4742544 (1988-05-01), Kupnicki et al.
patent: 4807298 (1989-02-01), Conte et al.
patent: 4910772 (1990-03-01), Matias et al.
R. Kupnicki et al., IEEE Publication 84CH2069-3, 1984.
Y. Mattias, M.S. Thesis, CS Dept., The Weizmann Inst. of Science, May 1987, pp. 12-16.

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