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
MOS transistor having combined-source structure with low power consumption and method for fabricating the same
Regenerative power storage system mounted on DC electric railway car
Method and system for remotely testing a wireless device
Devices, systems, and methods for tactile feedback and input
Scalable security services for multicast in a router having integrated zone-based firewall
Request routing based on class
Method and apparatus for storing email messages
  Randomly Featured Patents
Substituted 1H-3-Aryl-pyrrolidine-2,4-dione derivatives
Rigid primer bulb pump
Towel hanger base
Cooling device and image projection apparatus having the same
Expansion joint
Method and apparatus for mounting components to shorten tact time
Tip end of a golf club shaft
Divided dish
Printhead wiper for ink-jet printer
Expandable sand screen and methods for use