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
Accessing a base station
Plants and seeds of hybrid corn variety CH450823
Control method and allocation structure for flash memory device
Device for maneuvering a vehicle using maneuvering moves using at least one trajectory
Leadless integrated circuit packaging system and method of manufacture thereof
Processes for producing polyunsaturated fatty acids in transgenic organisms
Test method for inspection device, particularly for label seating inspection device
  Randomly Featured Patents
Method for operating gas turbine engine systems
Combined fragrance emitting patch and compact
Process of making polyacrylonitrile fibers
Mechanical face seal for a rotating shaft of a fluid pump
Measurement apparatus and method
Measuring vascular access pressure
Retention factor database
Stable mixture for the detection of alkaline phosphatase containing a salt of o-cresolphthalein monophosphoric acid
Method for the transmission of data
Procedure for fastening an object and a hydraulic fastening apparatus