SecurityTolerance and Performance Analysis of Multi-Keys KDC

With the widespread use of the Internet, security becomes a critical problem in various applications. In a security system, keys play a fundamental roll. In the paper, the keys management between users and KDC (key distribution center) is changed to improve the security tolerance of system and to alleviate the danger of leaking key. Two methods are applied in the paper. One is that different key encrypting keys are applied between users and different KDC units; the other is that many key encrypting keys are applied for a data key before data communication to get the different part of the data key. Then their performances are analyzed. Results of the analysis prove the methods proposed in the paper in favor of achieve above motive.