Efficient and Secure Pairing-free ID-based Directed Proxy Signature Scheme
Journal Title: IOSR Journal of Mathematics(IOSR-JM) - Year 2018, Vol 14, Issue 6
Abstract
The proxy signature, a variant of the ordinary digital signature, has been an active research topic in recent years; it has many useful applications, including distributed systems and grid computing. In an ordinary proxy signature scheme any one can verify the validity of a proxy signature produced by the proxy signer on behalf of original signer. But public verifiability of proxy signature is not desirable in some applications where the signed message is sensitive to the signature receiver, for example signatures on medical records, tax information. To meet this requirement, the concept of directed proxy signature was introduced. A directed proxy signature scheme is a kind of signature scheme in which the verification ability is controlled by the proxy signer. Although many identity-based proxy signature schemes have been proposed in the literature, only a few identitybased directed proxy signature schemes are available. However, it has been found that all these schemes are using bilinear pairings over elliptic curves. But the computation of a bilinear pairing is very expensive. Hence the schemes which use pairings are less efficient and are not much applicable in practice. In order to improve the computational and communicational efficiency, in this paper, we propose a pairing-free Identity based directed proxy signature scheme. The proposed scheme is proven secure against different types of adversaries in the random oracle model under the assumption that the elliptic curve discrete logarithm problem is hard. We compare our scheme with well known existing schemes and efficiency analysis shows that the proposed scheme is more efficient.
Authors and Affiliations
R. R. V. Krishna Rao,, N. B. Gayathri,, P. Vasudeva Reddy
Keywords
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- EP ID EP433247
- DOI 10.9790/5728-1406017384
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