Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for time stamp-based replay protection and PDSN synchronization at a PCF










Image Number 2 for United States Patent #7116668.

A packet control function (PCF) exchanging messages with a packet data serving node (PDSN) in a wireless communication network guards against malicious or erroneous message replay by checking the "reasonableness" of PDSN time stamps in registration messages it receives over its PDSN interface. Received messages that are too old are rejected by the PCF, even if otherwise valid. A configurable time threshold may be set at the PCF that determines the allowable maximum age of a received message. Further, because messages received from the PDSN contain echoed identifier values generated by the PCF, the PCF may implement identifier value function generation that insures no repeated identifier values over a desired interval. The desired interval is set larger than the allowable message age to further guard against attempted message replay.








 
 
  Recently Added Patents
Smartphone
Method and system for fail-safe call survival
Systems, devices, methods, and compositions including fluidized x-ray shielding compositions
Method, system, and computer program product for scoring theoretical peptides
Multi-channel memory system including error correction decoder architecture with efficient area utilization
Injection molding method and injection molding machine
White polyester film and surface light source therewith
  Randomly Featured Patents
Method and system for attachment of light emitting diodes to circuitry for use in lighting
Cobalt catalysts, and use thereof for the conversion of methanol and for Fischer-Tropsch synthesis, to produce hydrocarbons
Method of processing red eye in digital images
Device for cutting of slot-like key seats in wells by a hydroabrasive method
Rubber Compositions
Method of assembling a heated insulating glass panel with a fitting
Heat sink method of manufacturing the same and device of manufacturing the same
Semiconductor device having an electrode containing boron and manufacturing method thereof
Methods and terminals that control avatars during videoconferencing and other communications
Metal complex compound and organic electroluminescent element using the same