Patents Assigned to InterDigtal Technology Corporation
  • Patent number: 6009135
    Abstract: A code division multiple access (CDMA) is a type of spread-spectrum communication system having a plurality of subscriber units and at least one base station. In order for a first subscriber unit to communicate with a second subscriber unit, a transmitter unit of the first subscriber unit imprints a unique code upon transmission and the second subscriber unit includes a receiver, which uses the code to decode the transmission. In addition, each transmitter with a CDMA communication system includes a stream cipher generator for enciphering the voice and data communications. Each receiver within a CDMA communication system contains an identical or similar stream cipher generator, which is used to decipher the received enciphered communication. The present invention relates to a stream cipher generator having a plurality of linear feedback shift registers to produce a stream cipher for increasing security using ciphered messages.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: December 28, 1999
    Assignee: InterDigtal Technology Corporation
    Inventor: Fatih M. Ozluturk