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2017, Volume 18, Issue 7

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Frontiers of Information Technology & Electronic Engineering >> 2017, Volume 18, Issue 7 doi: 10.1631/FITEE.1601054

Low-computation certificateless hybrid signcryption scheme

. School of Computer, Qinghai Normal University, Xining 810008, China.. School of Computer Science, Shaanxi Normal University, Xi’an 710062, China.. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China

Available online: 2017-09-20
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Abstract

Hybrid signcryption is an important technique signcrypting bulk data using symmetric encryption. In this paper, we apply the technique of certificateless hybrid signcryption to an elliptic-curve cryptosystem, and construct a low-computation certificateless hybrid signcryption scheme. In the random oracle model, this scheme is proven to have indistinguishability against adaptive chosen-ciphertext attacks (IND-CCA2) under the elliptic-curve computation Diffie-Hellman assumption. Also, it has a strong existential unforgeability against adaptive chosen-message attacks (sUF-CMA) under the elliptic-curve discrete logarithm assumption. Analysis shows that the cryptographic algorithm does not rely on pairing operations and is much more efficient than other algorithms. In addition, it suits well to applications in environments where resources are constrained, such as wireless sensor networks and ad hoc networks.

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