An efficient authorization electronic signature method without authentication center

Abstract

The present invention relates to a high-efficiency authorization electric signature method without an authentication center. The method comprises the following specific procedures: confirming the system parameter; registering the subscriber; executing authorization by a consigner; executing electric signature authority by an agent; and checking the received data text by a receiver. The invention is based on the solving difficulty of elliptic curve discrete logarithm problem on the finite field. Through organically combining an authorization document, an original signatory identity and agent signatory identity to a whole, and without the help of a third reliability authorization center, all the authorization operations comprising the operations to the public key certificate of the consigner, the public key of the agent, the authorization document and the authorization electric signature can be completed with only one step of operation. Furthermore the invention can help the consigner torealize the effective control to the authority range of the agent for executing the electric signature authority for preventing the agent authority abuse of the agent.

Description

technical field [0001] The invention belongs to an electronic signature method in the field of network information security, in particular to an efficient authorized electronic signature method without an authentication center. Background technique [0002] Electronic signature technology is one of the most basic technologies in various information-related fields such as e-commerce systems, e-government systems, information security systems, and network communication systems. It simulates the functions of handwritten signatures in real life. It not only has the capabilities of identity authentication, source identification, non-repudiation, and anti-counterfeiting, but also can perform integrity authentication on data messages, and can ensure the authenticity and security of data messages. , reliability and legality, so it is of great significance to ensure the normal operation of the information system. In many countries, including our country, electronic signatures have b...