METHOD AND SYSTEM FOR SECRET KEY SHARING BASED ON KEY BINDING BY USING CONFIDENCE INTERVALS

摘要

PURPOSE: A method for sharing a secrete key of a key combination method by using a reliable section and a system thereof are provided to supply a high recognition rate by using the same bio information for both encoding and decoding even though the number of fake bolts are increased. CONSTITUTION: An image processing unit(110) senses bio information of a user to obtain an image and generates feature information from the image. A difference value calculating unit(120) calculates difference values by comparing reliable sections stored in a security token. A bolt forming unit(130) obtains corresponding values by inputting the difference values to a purge bolt polynomial expression and forms a first bolt set for the corresponding values. A server transmitting unit(140) generates fake bolts and transmits a second bolt set combining the first bolt set with the fake bolts to an authentication server. [Reference numerals] (110) Image processing unit; (120) Difference value calculating unit; (120a,160a) Security token; (120a',160a') Reliable section; (130) Bolt forming unit; (140) Server transmitting unit; (150) Password processing unit; (160) Difference value extracting unit; (170) Secrete key calculating unit; (AA) Internet; (BB) Client; (CC) Server