Adaptive multi-step digital signature system and method of operation thereof
Patent 5867578 Issued on February 2, 1999. Estimated Expiration Date: 
August 19, 2016. 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.
August 19, 2016. 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 ReferencesPublic key/signature cryptosystem with enhanced digital signature certification Method to establish and enforce a network cryptographic security policy in a public key cryptosystem Method for delegating authorization from one entity to another through the use of session encryption keys Fair cryptosystems and methods of use Fair cryptosystems and methods of use Computer network cryptographic key distribution system Patent #: 5481613 InventorsApplicationNo. 699579 filed on 08/19/1996US Classes:713/180, Generating specific digital signature type (e.g., blind, shared, or undeniable)380/30, Public key380/286, Key escrow or recovery713/157Chain or hierarchical certificatesExaminersPrimary: Barron, Gilberto Jr.Attorney, Agent or FirmInternational ClassH04L 009/32AbstractA multi-step digital signature system and method is provided having a distributed root certifying authority 20. Messages received at the root certifying authority 20 are distributed to root certifying authority members 22-30 who attach partial signatures to the message using root key fragments. In the system and method provided, the system adapts to system events such as the addition or removal of key fragment holders, the need to modify key fragments, etc., by changing key fragments.Other References
Field of SearchPublic key | |
