Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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 for cutting C--Mn steel with a fiber laser
Frame timing synchronization in a geostationary satellite system
Database caching utilizing asynchronous log-based replication
Memory device and method for repairing a semiconductor memory
Non-volatile flash-RAM memory with magnetic memory
Method and system for security authentication of radio frequency identification
Advertising apparatus
  Randomly Featured Patents
Method and apparatus for ultrasonic etching of printing plates
Exposure device for copying apparatus
Human coagulation factor VII polypeptides
High density recording system using side-by side information and servo tracks
Toaster
Multilayer printed wiring board and method for manufacturing the same
Screening method and apparatus
Organizing memory extents of OS input/output control
Ramp
Pyrylium- and thiopyrylium-sensitized low-persistence photoconductive compositions and elements