Resources Contact Us Home
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
Community profiling for social media
Light emitting device and electronic device
System for the secure management of digitally controlled locks, operating by means of crypto acoustic credentials
Authentication platform and related method of operation
Light emitting device and light emitting device package
Manufacturing process for cellular screening substratum, resultant substratum, and method and apparatus for screening
Inhibitors of human immunodeficiency virus replication
  Randomly Featured Patents
Touch monitor
Device for monitoring the concentration of gaseous constituents in mixtures of gases
Saddle cover
Processing photographic material
Turbine of thermostructural composite material, in particular a turbine of large diameter, and a method of manufacturing it
Solar collector
Method for preparing sulfones
Inclusion complex of beta-cyclodextrin and diclofenac, its preparation and use
Injectors of a fuel supply system for an internal combustion engine
Seat correcting mechanism for sprung balance regulating device