An Adjustable Secure Key Automatic Establishment For Peer To Peer Communication

A crucial technique of information secure for peer to peercommunication—adjustable secure key automatic establishment method is discussedin this paper.Currently, the technique of information secure include many factors. Amongthem, the secure of cryptographical method is a important part. But it is impossible forus to ensure the cryptographical method not to be leaked. So people used to make themethod open and ensure the security of information by the security of securepassword. The management and exchange of the secure password is also a keytechnique of the information secure.By analyzing the popular protocol of key management and exchange(such asDiffie-Hellman----the key exchange agreement and the PKI technique), aiming atadvantages and disadvantages of these protocols, we put forword a kind of newtechnique for peer to peer communication. This method mainly is divided into fourstage:the raw key generation, the key distillation, the key rectification and the keycontrolment. By the strategy, we can establish the key with arbitary length to use insymmetrily encryption.After the key generation, in order to verify its result to really satisfy the basicrequest of the key- randomicity, we will use a set of test tool(NIST) to test the randomproperty of the key. Passing the test, the key has a well randomicity and can used forvarious symmetry encryption.Using this technique, we can build a secure key for information encryption. It ismore simple and secure than PKI technique. It is easy to use and manage. Meanwhilethe key built by this way is adjustable in length and existence period.