U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Data randomization equipment

Patent 4850019 Issued on July 18, 1989. Estimated Expiration Date: Icon_subject November 3, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3370126

3798360

Channel estimating reference signal processor for communication system adaptive antennas
Patent #: 4217586
Issued on: 08/12/1980
Inventor: McGuffin

Transistor integrated device, particularly usable for coding purposes
Patent #: 4409434
Issued on: 10/11/1983
Inventor: Basset ,   et al.

Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform
Patent #: 4707839
Issued on: 11/17/1987
Inventor: Andren ,   et al.

Method and device of increasing the execution speed of cipher feedback mode of the DES by an arbitrary multiplier Patent #: 4731843
Issued on: 03/15/1988
Inventor: Holmquist

Inventors

Assignee

Application

No. 06/926043 filed on 11/03/1986

US Classes:

380/29, NBS/DES algorithm380/33, Using plural paths or channels380/37, Block/data stream enciphering380/46Nonlinear (e.g., pseudorandom)

Examiners

Primary: Buczinski, Stephen C.
Assistant: Gregory, Bernarr E.

Attorney, Agent or Firm

International Class

H04L 9/06 (20060101)

Foreign Application Priority Data

1985-11-08 JP

Abstract

Input data is split by a splitting part into a plurality of block data having an equal data length to be processed through respective channels. Each channel data is subjected in a function operation part to a function operation in direct or indirect relation to all the other channel data to produce new channel data. Each channel data is subjected in a transform operation part to a transform operation to produce new channel data. All final channel data obtained after function and transform operations are combined by a combining part to obtain randomized data.

Other References

  • "Exhaustive Cryptanalysis of the NBS Data Encryption Standard", by W. Diffie et al., Computer, vol. 10, No. 6, Jun. 1977, pp. 74-84
  • "Modular Design of Information Encipherment for Computer Systems", by J. P. Pieprzyk, Computers & Security, vol. 4, No. 3, Sep. 1985, pp. 211-218
  • "Structured Design of Substitution-Permutation Encryption Networks", by J. B. Kam et al., IEEE Trans. on Computers, vol. C-28, No. 10, Oct. 1979, pp. 747-753
  • "Data Security Device" by P. N. Prentice, IBM Technical Disclosure Bulletin, vol. 19, No. 7, Dec. 1976, pp. 2607-2609
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