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
LED string with a capability to maintain a current path and LED unit thereof
Feature-based autocorrection
Profile-based user access to a network management system
Pixel circuit
Rate controlled first in first out (FIFO) queues for clock domain crossing
Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities
Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding
  Randomly Featured Patents
Process for preparing residues containing dihydroxy compounds
Low frequency inverter fed by a high frequency AC current source
Covering apparatus for concrete bridge beams and pillars
RFID active/passive tag identifying failed sub-CRU and location within higher level CRU
Novel compositions for establishing environmental conditions favorable to oral leucocytes
Composition of fluoroelastomer and diorganosulfuroxide
Image reading apparatus and image reading method
Temperature control systems
Method for removing iodine compound from acetic acid
Systems and methods for enabling assured records using fine grained auditing of virtual private network traffic