Ring signature scheme for ECC-based anonymous signcryption
ABSTRACT This study presents an elliptic curve cryptosystem-based signcryption scheme with anonymity features. The scheme possesses the properties of elliptic curve cryptosystem and ring signature. While the technique of ring signature endows the signers with anonymity, the elliptic curve cryptosystem provides advantages like high security, low computation load, and small bandwidth requirements. Integrating the advantages of these two applications, the outcome is a highly secure and efficient anonymous signcryption scheme. Signcryption does not require an advance establishment of session key for each session. Thus, transmission load is reduced, and efficiency of performance and transmission enhanced.
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ABSTRACT: Signcryption is a new paradigm in public key cryptography. A remarkable property of a signcryption scheme is that it fulfills both the functions of public key encryption and digital signature, with a cost significantly smaller than that required by signature-then-encryption. The purposes of this paper are to demonstrate how to specify signcryption schemes on elliptic curves over finite fields, and to examine the efficiency of such schemes. Our analysis shows that when compared with signaturethen-encryption on elliptic curves, signcryption on the curves represents a 58% saving in computational cost and a 40% saving in communication overhead.Information Processing Letters. 01/1998;