Resources Contact Us Home
Method for verifying the expected postage security device and an authorized host system

Image Number 7 for United States Patent #6397328.

A method for verifying that the expected components of a postage metering system includes alternate embodiments for verifying a PSD coupled to a host system is the expected PSD. The method further includes verifying the host system as the expected host system. A first message is encrypted in the PSD using a first cryptographic key to obtain a first encrypted message. The first encrypted message is sent to the host system which decrypts the first encrypted message using a second cryptographic key. The host system then encrypts a second message derived from the decrypted first encrypted message using the second cryptographic key. The host system then sends the encrypted second message to the PSD which decrypts the second encrypted message in the PSD using the first cryptographic key. The PSD compares the decrypted second encrypted message with the first message, and activates the PSD for processing transactions requested by the host system when the decrypted second encrypted message corresponds to the first message.

  Recently Added Patents
Packet transmission method, apparatus, and network system
Method and system for placing an emergency call
Brushless electric motor or generator in shell construction
Modular microscope construction
Precoding codebooks for MIMO communication systems
Method of creating animatable digital clone from multi-view images
  Randomly Featured Patents
Probes and methods for detecting melanocortin-4 receptor
Integrated circuit dielectric and method
Catecholamine esters
Fuel injection nozzle
System and method for increasing asset utilization using satellite aided location tracking
Low viscosity oligomer oil product, process and composition
Circuit for controlling LED with temperature compensation
Solder bump structure and method of manufacturing same
Method for reducing zinc oxide content of zinc particles