Distribution of random session key based on key-insulated public-key cryptosystems

Based on the characteristic of key-insulated public-key cryptosystem, we propose a distributed random session keys distribution protocol without a key distribution center. The session key is generated by different user and only used one time. So the key is one-time key. In addition, the user who generates the next one-time key, is random selected by the current session key. In the protocol of this paper, the characteristic of time in the key-insulated public-key, a distributed protocol, translates into the characteristic of space which every point has different secret key in the different period. At the same time, the system is fit for key management in Ad Hoc, and is a new scheme of key management in Ad Hoc.