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
Ternary thermoelectric material containing nanoparticles and process for producing the same
Reordering search query results in accordance with search context specific predicted performance functions
Image selection device and image selection method
Mobile communication method, mobile station, and radio base station
Swirler for gas turbine engine fuel injector
Methods and apparatus for using self-contained transaction components to facilitate online transactions
Arrangement of at least one personal service unit in a vehicle
  Randomly Featured Patents
Equipment carrier with a rotatable handle
Servo controlled isocenter diagnostic x-ray examination apparatus
Semiconductor device having an interposing layer between an electrode and a connection electrode
Apparatus for cutting hand holes in bags
Heat exchanger
Vehicle motion logger
Rose plant named `Evera 104`
Apparatus and systems for common mode voltage-based AC fault detection, verification and/or identification
Imidochromium compounds in catalyst systems for olefin polymerization
Dispenser for a liquid or pasty product