Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Providing virtual networking functionality for managed computer networks
Controlling access of a client system to an access protected remote resource
Polymer-coated liquid packaging board, a package formed from it and the use of the polymer
Attachment apparatus for coupling with an endoscope
Control of shoot/foliar feeding pests with pesticide seed treatments
MAC structure with packet-quasi-static blocks and ARQ
Toner, developer and method for producing toner
  Randomly Featured Patents
Head restraint
P-chiral phospholanes and phosphocyclic compounds and their use in asymmetric catalytic reactions
Method for transferring gene
Capping apparatus for an ink jet printer
Pneumatically operated stapler with improved actuating and clinching mechanism
Keyed interconnection for distinguishing input connections and output connections
Tool for opening a pressure cooker
Flexible tube with gussets
Handheld case gripper
Access circuit test for transfer engineering