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
Printing device, printing system, program, and printing method for printing based on print data from a user authorized to issue a print instruction for the print data
High-density 3-dimensional structure
Automatic stop and restart device for an engine
Method and system for simulating wireless networks
Selection of hash lookup keys for efficient retrieval
Display screen or portion thereof with graphical user interface
Push button
  Randomly Featured Patents
Air conditioner
Treatments and kits for creating transparent renewable surface protective coatings
Camera capable of issuing composition information
Control system for automotive charging generator
Dual display liquid crystal display device, method of operating the same, and mobile communication terminal including the same
Liquid crystal display device, black matrix substrate and color filter substrate
Toner for developing a static latent image and image forming apparatus
Plug connector arrangement
EMI gasket
Cooling apparatus for an electronic device integrally formed with a circuit board