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Improvement in RSA Cryptosystem

Author(s): Seema Verma | Deepak Garg

Journal: Journal of Advances in Information Technology
ISSN 1798-2340

Volume: 2;
Issue: 3;
Start page: 146;
Date: 2011;
Original page

Keywords: cryptosystem | encryption | signature verification | RSA-CRT | semantic security

Boneh and Shacham gave a nice survey on four variants (Batch RSA, MultiPrime RSA, MultiPower RSA, Rebalanced RSA). Rebalanced RSA and MultiPower RSA were then combined to increase the decryption/signature generation performance. This combination theoretically improves the decryption/signature generation time about 14 times than RSA with CRT and about 56 times than the standard RSA with key size 2048bits. On the encryption side, it increased the encryption time, thus making encryption/signature verification very costly. Here in this paper we further tried to increase the encryption/signature verification performance. The proposed scheme is semantically secure also.
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