Provable efficient certificateless group key exchange protocol

  title={Provable efficient certificateless group key exchange protocol},
  author={Chunjie Cao and Jianfeng Ma and Sangjae Moon},
  journal={Wuhan University Journal of Natural Sciences},
Certificateless public key cryptography (CL-PKC) avoids the inherent escrow of identity-based cryptography and does not require certificates to guarantee the authenticity of public keys. Based on CL-PKC, we present an efficient constant-round group key exchange protocol, which is provably secure under the intractability of computation Diffie-Hellman problem. Our protocol is a contributory key exchange with perfect forward secrecy and has only two communication rounds. So it is more efficient… CONTINUE READING


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