Abstract
A signcryption scheme encrypts and signs data in a single operation which is more efficient than using an encryption scheme combined with a signature scheme. Identity-based cryptography (IBC) does not require users to pre-compute key pairs and obtain certificates for their public keys. Identity-based signcryption (IBSC) applies the idea of IBC to signcryption. IBSC involves five security notions: message confidentiality, signature non-repudiation, ciphertext anonymity, ciphertext unlinkability, and ciphertext authentication. Recently, the Pandey scheme has been proposed; the scheme uses an identity-based encryption scheme and an identity-based signature scheme. However, this scheme only achieves message confidentiality and signature non-repudiation. In this work, we improve the scheme to achieve additional security notions, ciphertext anonymity and ciphertext authentication, with no loss in efficiency.
This research was supported by the MKE(The Ministry of Knowledge Economy), Korea, under the ITRC support program supervised by the NIPA(National IT Industry Promotion Agency)(NIPA-2011-C1090-1001-0004) and by the Brain Korea 21 Project in 2011.
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Lee, W., Seo, J.W., Lee, P.J. (2012). Identity-Based Signcryption from Identity-Based Cryptography. In: Jung, S., Yung, M. (eds) Information Security Applications. WISA 2011. Lecture Notes in Computer Science, vol 7115. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27890-7_6
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DOI: https://doi.org/10.1007/978-3-642-27890-7_6
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