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Identity-based online/offline signcryption for low power devices |
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| Authors: | Fagen Li Muhammad Khurram KhanKhaled Alghathbar Tsuyoshi Takagi |
| Affiliation: | a School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China b State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100049, China c Faculty of Mathematics, Kyushu University, Fukuoka 819-0395, Japan d Center of Excellence in Information Assurance, King Saud University, Riyadh, Saudi Arabia |
| Abstract: | Confidentiality and authentication are the basic security requirements for many cryptographic applications. In this paper, we propose an efficient identity-based online/offline signcryption scheme, which is very suitable for low power devices such as smart cards or mobile devices. Our scheme has the following advantages: (i) It does not need to authenticate a public key and fulfills both confidentiality and authentication simultaneously at a lower cost. (ii) Most of computations are carried out offline and online part is very efficient. (iii) It does not require the message and the receiver's identity in the offline stage. The message and the receiver's identity are only needed in the online stage. Compared with the existing schemes, our scheme have the great advantage of the offline storage and ciphertext length. |
| Keywords: | Low power devices Identity-based cryptography Online/offline signcryption Bilinear pairings Provable security |
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