Research And Implementation Of PKI Trust Model And Certificate Authority Based On Intrusion Tolerance

It's important to choose trust model and establish certificate authority in the PKI system.The choice of trust model is a key step during the construction and operation of PKI. Intrusion Tolerance has a kind of ability with positive defenses.Intrusion tolerance can accomplish the function to maintain integrality,confidentiality and usability of key information and service in the whole system,when some parts of the system protected are attacked.So it is necessary to study and develop intrusion tolerance system.Firstly the paper introduces the conception, principle, component and providing kernel service of PKI and CA.Secondly,it analyses the currently available trust model and constructs a hybrid trust model.Then, It explains conception, application area, class and implement method,RSA algorithm and threshold cryptography system of intrusion tolerance technology.Thirdly,on the background of RSA, taking threshold aryptography as research objective and intrusion tolerance as application environment and so on,the paper provids a threshold RSA signature algorithm. Then the thesis uses this scheme to design CA of intrusion tolerance and design the system structure and function.At the same time, the paper provides the method of implement.Lastly, the paper researches security, reliability, validity of threshold RSA signature schemes and the system capability.