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
Chair
Method and apparatus for selective decoding in a wireless communication system
Navigating applications using side-mounted touchpad
System and method for enhanced artificial bandwidth expansion
Permeable pressure sensitive adhesive
Methods and apparatus for monitoring communication through identification of priority-ranked keywords
Switched capacitor hold-up scheme for constant boost output voltage
  Randomly Featured Patents
Method for editing a multi-point facies simulation
Method of preparing a two-way shape memory alloy
Portable system and method for non-intrusive radioscopic imaging
Acoustic wave device
Substrate loading and uploading station with buffer
Multi-anode detector with increased dynamic range for time-of-flight mass spectrometers with counting data acquisition
Subframe structure and vibration damper for the same
Inkjet print head recapping mechanism
Retainer, exposure apparatus, and device fabrication method
Visual axis detection apparatus and optical apparatus provided therewith