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
Community profiling for social media
Verification of computer-executable code generated from a model
Methods and apparatuses for anti-shading correction with extended color correlated temperature dependency
Method and system for using personal devices for authentication and service access at service outlets
Method and system for security authentication of radio frequency identification
Systems and methods for DC-to-DC converter control
Curable inks comprising surfactant-coated magnetic nanoparticles
  Randomly Featured Patents
Digital camera
Image forming device
Method for power consumption reduction in a limited-switch dynamic logic (LSDL) circuit
Multipurpose illumination device
Control device for refrigeration cycle
Copolymers of maleic anhydride by stable free redical polymerization
Positioning fixture for rock bit welding
Direct acting hydraulic valve lifter with integral plunger
Electrolytic cell having membrane enclosed anodes
Violin thumb pad