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Volume 31 Issue 7
Dec.  2010
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Chen Yong-gang, Jia Chun-fu, Lü Shu-wang. An Efficient Signcryption Scheme Based on CPK[J]. Journal of Electronics & Information Technology, 2009, 31(7): 1753-1757. doi: 10.3724/SP.J.1146.2008.01113
Citation: Chen Yong-gang, Jia Chun-fu, Lü Shu-wang. An Efficient Signcryption Scheme Based on CPK[J]. Journal of Electronics & Information Technology, 2009, 31(7): 1753-1757. doi: 10.3724/SP.J.1146.2008.01113

An Efficient Signcryption Scheme Based on CPK

doi: 10.3724/SP.J.1146.2008.01113
  • Received Date: 2008-09-08
  • Rev Recd Date: 2009-01-12
  • Publish Date: 2009-07-19
  • In this paper, a new signcryption scheme called CPK-SC is proposed based on Combined Public Key (CPK) to resolve the authentication and non-repudiation problem. CPK-SC discards the pairings and solves the restriction that the traditional identity-based signcryption schemes can only deal with fixed length messages by introduction symmetric cryptography algorithm. CPK-SC spends fewer computations and produces shorter ciphertext, which can be widely used in the environment of computation and communication resource constrained, such as mobile ad-hoc network. In the random oracle model, the security of CPK-SC is tightly related to the Decision Diffie-Hellman (DDH) assumption.
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