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
Analogue-to-digital converter
Information processing apparatus capable of authentication processing with improved user convenience, control program for information processing apparatus, and recording medium having control
Scale information for drawing annotations
Case for electronic device
Electronic device and printed circuit board
Stable file system
  Randomly Featured Patents
Light guide plate, light guide plate unit, and planar lighting device
Device and method for gas treatment using pulsed corona discharges
Management of warranty information in vital product data for replaceable units of data handling systems
Decision circuit operable at a wide range of voltages
In orbit space transportation and recovery system
Flexible printed circuit layout and method thereof
Brain function measurement device, brain function measurement method, and brain function measurement program
Optical wavelength multiplexed transmission module, and wavelength multiplexed transmission system using the same