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
Method and system for migrating object update messages through synchronous data propagation
Intrinsic absorber layer for photovoltaic cells
Method and system for an integrated host PCI I/O bridge and dual port gigabit ethernet controller
Method, apparatus and article for detection of transponder tagged objects, for example during surgery
Light emitted diode
Managing a packet service call within mobile communications user equipment
Enhancement of semiconducting photovoltaic absorbers by the addition of alkali salts through solution coating techniques
  Randomly Featured Patents
Intake manifold regulators for internal combustion engines
Polypropylene resin composition
Apparatus and method for locating individuals and objects using tracking devices
Cloned genome of infectious hepatitus C virus of genotype 2A and uses thereof
Switch level simulation system
Photon Calorimeter
Addition curing silicone rubber composition and pressure-sensitive adhesive rubber sheet
Integrated circuit having a resistive memory
Computer protection and carrying case
Fiberglass pool