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
Information repository search system
System and method for judging success or failure of work of robot
Method for computing an energy efficient route
Mounting structure, electro-optical apparatus, and touch panel
Process for manufacturing a self-sealing composition
Authenticating messages sent between a vehicle and a central facility
Electronic badge
  Randomly Featured Patents
Methods for making nucleic acids
Dispenser case for a contact lens cleaning fabric
DC-DC converter and control method thereof
Image forming apparatus and image density control method
Apparatus and method for driving a lamp unit, and liquid crystal display device using the same
Tomographic apparatus for producing transverse layer images
Method for determining true meridian and device for its implementation
Golf club head
Graphical image processing with levels of user access