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
Methods and systems for detecting icing conditions
Water slide
Produce container and lid assembly
Visual universal decryption apparatus and methods
Implantable device
Social community generated answer system with collaboration constraints
  Randomly Featured Patents
Method and apparatus for detecting and discriminating tachycardia
Flurocarbon pumping system
Apparatus for attaching a supplemental device to a minimally altered host firearm
Memory clear system
Bottom gate-type thin-film transistor and method for manufacturing the same
Method of using 1-arylheteroarylalkyl substituted-1H-1,2,4-triazole compounds for treatment of a glaucoma disorder
Semiconductor memory device and refresh control method
Process for modifying drug crystal formation
Optical reading device, control method for an optical reading device, and storage medium
Method, apparatus and system for detecting mode and guard interval