High security system for electronic signature verification
Protection system for intelligent cards
Method for certifying the origin of at least one item of information stored in the memory of a first electronic device and transmitted to a second electronic device, and system for carrying out the method
User authentication system employing encryption functions
Process and apparatus for authenticating the signature of a signed message
Computer key and computer lock system
Method and apparatus for checking the authenticity of individual-linked documents and the identity of the holders thereof
Security transaction system for financial data
Method and system for personal identification
Method and system for suthenticating electronic memory cards Patent #: 4910774
ApplicationNo. 268803 filed on 11/08/1988
US Classes:705/66, Intelligent token initializing or reloading235/379, Banking systems235/380, Credit or identification card systems340/5.4, Credit380/29, NBS/DES algorithm380/30, Public key713/180Generating specific digital signature type (e.g., blind, shared, or undeniable)
ExaminersPrimary: Buczinski, Stephen C.
Assistant: Gregory, Bernarr E.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04L 009/30
AbstractA method for "on-line/off-line" digital signing is described and begins by pre-computing a data string x from a pair of matching public and secret keys of a digital signature scheme such that, for any message m later selected to be signed, a signature of m derived from x can be computed substantially faster than the signature of m derived from the matching public and secret keys. After a message m is selected to be signed, the method computes a signature ς of the message m using the data string x. Because the method uses a two-stage approach to sign a message, the technique can be advantageously used to enhance the security of known digital signature schemes or to effect transaction processing using "smart" cards.