One-show blind signature systems
Patent 4914698 Issued on April 3, 1990. Estimated Expiration Date: 
July 24, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for transaction and identity verification Method and apparatus incorporating a one-way sequence for transaction and identity verification Blind signature systems Blind unanticipated signature systems Patent #: 4759064 InventorApplicationNo. 384092 filed on 07/24/1989US Classes:380/30, Public key705/69, Electronic cash detail (e.g., blinded, divisible, or detecting double spending)713/180Generating specific digital signature type (e.g., blind, shared, or undeniable)ExaminersPrimary: Cangialosi, SalvatoreAttorney, Agent or FirmInternational ClassH04L 009/00AbstractNumbers standing for cash money can be spent only one time each, otherwise the account from which they were withdrawn would be revealed. More generally, a technique for issuing and showing blind digital signatures ensures that if they are shown responsive to different challanges, then certain information their signer ensures they contain will be revealed and can be recovered efficiently. Some embodiments allow the signatures to be unconditionally untraceable if shown no more than once. Extensions allow values to be encoded in the signatures when they are shown, and for change on unshown value to be obtained in a form that is aggregated and untraceable.Field of SearchPublic key | |
