Resources Contact Us Home
Authentication system

Image Number 3 for United States Patent #8132009.

An authentication system determines if a counterfeit ineligible unit is installed in a main device. When connected with a battery pack, a notebook PC generates and combines a random number and a function determination signal using a signal combining unit and transmits same to the battery pack. A first function calculation unit calculates the function of the random number. The battery pack has a signal separation unit to separate the combined signal into the random number and function determination signal, and a second function calculation unit to calculate the function of the random number for transmitting back to the notebook PC. A comparison unit compares the calculation results by the first and second function calculation units to determine whether the connected battery pack is an authorized one and denies connection if the pack is an unauthorized one.

  Recently Added Patents
Random access point (RAP) formation using intra refreshing technique in video coding
Power consumption management in a MIMO transceiver and method for use therewith
Methods of isolating bipotent hepatic progenitor cells
Concentrating photovoltaic system module with actuator control
Method of fabricating semiconductor light emitting device
Panel for decoration
Method and system for automatic 3-D image creation
  Randomly Featured Patents
Camera with speed light device
Process for the preparation of a thickness-reduced draw-formed can
Composer circuit and method for encoding device independent multi-modal content
Bus repeater for coupling a first and second bus
Geared motor
Activated carbon adsorption of flotation reagents from tungsten solutions
Data packet discard notification
Degradation assembly
Series twin leaf spring weighing scale
HPLC column design and method of making same