A new Ad hoc group key agreement scheme based on ECC

作者：Feng Tao^*; Wang Yi Lin; Ma Jian Feng

来源：Acta Electronica Sinica, 2009, 37(5): 918-924.

• Backward secrecy
• Discrete logarithm problems
• Elliptic curves
• Forward secrecy
• Group key agreement

In secure group communication, group key management is the most critical issue. Firstly, we analyze the state and the problem of existing group key management schemes, and then present a secure, efficient and contributory group key management scheme based on elliptic curve cryptosystems. The security, correctness and completeness of our scheme are discussed in this paper. The security of our scheme relies on the elliptic curve discrete logarithm problem (ECDLP). For the sake of the forward secrecy and backward secrecy of group key, new scheme supports group members to renew their group key when the external nodes join the group or the internal members leave the group. Compared with the known approaches, new scheme attaches more importance to impartiality, the group structure is unfixed, all participants only need two-rounds to generate the group key, the low memory cost is also the virtue of our scheme. The new scheme is suitable for application in Ad hoc network environment.

• 出版日期2009
• 单位西安电子科技大学