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
Organic light-emitting display and method of manufacturing the same
Wireless communications apparatus and wireless communications method
Synchronous rectifier network unit circuit and method
Reuse of static image data from prior image frames to reduce rasterization requirements
Flip-chip mounting resin composition and bump forming resin composition
Measurement protocol for a medical technology apparatus
Low cost mesh network capability
  Randomly Featured Patents
Cam assembly for skip-print mandrel wheel assembly
Tooling for manufacturing cages for roller bearings
Method of catalytically hydrolyzing alpha, beta-unsaturated carbonyl compounds
Process for the preparation of alkylthioalkanoate salts
Stator winding for an electric machine
Remote turn-on circuit for automobile audio amplifier
Electronic musical instrument
Container holder
Weatherproof low friction spindle unit
Combination baby cooling pad and cover therefor