Resources Contact Us Home
Token based new digital cash protocols with combined blind digital signature and pseudonym authentication

Image Number 14 for United States Patent #7877331.

Digital cash token protocols use a combination of blind digital signatures and pseudonym authentication with at least two pairs of public and private keys. A user is provided with one master pair of private and public keys and as many pseudonym pairs of private and public keys as desired. The resulting digital cash token based hybrid protocols combine the advantages of blind digital signature and pseudonym authentication. Blind digital signatures based on the master pair of keys are used to withdraw digital cash from the user's bank account under the user's real identity. A pseudonym pair of keys is used for converting digital cash into digital cash tokens by a digital cash issuer. All pseudonyms can be used for spending the digital cash tokens. These protocols ensure anonymity when withdrawing digital cash from the user's account under the user's real identity in addition to providing pseudonym authentication when spending digital cash tokens under a pseudonym.

  Recently Added Patents
Automatic portable electronic device configuration
Interferer region identification using image processing
Distortion estimation for quantized data
Light emitting device
Information processing apparatus capable of authentication processing with improved user convenience, control program for information processing apparatus, and recording medium having control
Optical coherence tomography with multiple sample arms
Image-capturing device and projection automatic calibration method of projection device
  Randomly Featured Patents
Kit for diagnosing plant diseases
Center loaded citizens band antenna
Television receiver
Manually indexed adjustable focal length planetarium
Thermal transfer recording apparatus
User interactive control of computer programs and corresponding versions of input/output data flow
Diamond tool with non-abrasive segments
Crutchless leg support system
X-ray film cassette holder
Marine vessel shell module