Cryptography – Communication system using cryptography – Pseudo-random sequence scrambling
Reexamination Certificate
2002-05-31
2008-08-12
Moise, Emmanuel L. (Department: 2137)
Cryptography
Communication system using cryptography
Pseudo-random sequence scrambling
C708S252000
Reexamination Certificate
active
07412057
ABSTRACT:
Embodiments of the present invention provide a fast, software-implemented data scrambling system for data communications. For pseudo-random codes that are periodic within a predetermined number of bits, a memory array may be populated with segments of the code, one entry in the array starting at a unique bit position within the code. During data scrambling, a seed code may be used to identify a first entry from the array that should be used for scrambling. Thereafter, subsequent segments may be retrieved by traversing the array in a regular fashion. By calculating the code before use and by populating the array prior to processing of any source data, the system is very fast.
REFERENCES:
patent: 5946473 (1999-08-01), Lotspiech et al.
patent: 6069954 (2000-05-01), Moreau
Supplement to IEEE Standard for Information Technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: High-speed Physical layer in the 5 GHZ Band, Sponsor: LAN/MAN Standards Committee of the IEEE Computer Society, Approved Sep. 16, 1999, IEEE-SA Standards Board, ISBN 0-7381-1809-5 SH94787, p. 16.
Specification vol. 1, Specification of the Bluetooth System, Wireless Connections Made Easy, v1.0 B, Dec. 1, 1999, Part B, Baseband Specification, table of contents for Part B, p. 79 A compact disc storing a complete copy of this reference in PDF format is attached.
Abramovich Orly
Dagan Amit
Intel Corporation
Kenyon & Kenyon LLP
Moise Emmanuel L.
Pearson David J.
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