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http://dx.doi.org/10.13089/JKIISC.2018.28.2.327

On-Line/Off-Line Signature Schemes with Tight Security Reduction to the RSA Problem  

Choi, Kyung-yong (Sangmyung University)
Park, Jong Hwan (Sangmyung University)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.28, no.2, 2018 , pp. 327-338 More about this Journal
Abstract
On-line/off-line signature is a technique for performing heavy computations required for signature generation in the off-line stage and completing the final signature by a simple operation in the online stage. This is suitable for application environments that require immediate signing responses to multiple users. In this paper, we propose two new on-line/off-line signature schemes based on RSA problem. The first technique can generate a signature with a fixed base exponentiation when signing online, and the second technique can complete an online signature with a very simple calculation such as a hash operation. The security of both signatures is based on the RSA problem, which is proven to be tightly secure without security loss in the random oracle model.
Keywords
On-line/off-line signature; RSA problem; tight security reduction;
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