## CryptoDB

### Paper: A New ID-based Signature with Batch Verification

Authors: Jung Hee Cheon Yongdae Kim Hyo Jin Yoon URL: http://eprint.iacr.org/2004/131 Search ePrint Search Google An identity (ID)-based signature scheme allows any pair of users to communicate securely and to verify each other's signatures without exchanging public key certificates. We have several ID-based signatures based on the discrete logarithm problem. While they have an advantage that the system secret can be shared by several parties through threshold schemes, they have a critical disadvantage in efficiency. To enhance the efficiency of verification, we propose a new ID-based signature scheme that allows batch verification of multiple signatures. The verification cost of the proposed signature scheme for $k$ signatures is almost constant with minimal security loss and when a new signature by a different signer is added to the batch verification, the additional cost is almost a half of that of a single signature. We prove that the proposed signature scheme is secure against existential forgery under adaptively chosen message and ID attack in the random oracle model and show why other ID-based signature schemes are hard to achieve these properties.
##### BibTeX
@misc{eprint-2004-12103,
title={A New ID-based Signature with Batch Verification},
booktitle={IACR Eprint archive},
keywords={cryptographic protocols / ID-based signatures, Batch verifications},
url={http://eprint.iacr.org/2004/131},
note={ jin25@math.snu.ac.kr 12570 received 31 May 2004},
author={Jung Hee Cheon and Yongdae Kim and Hyo Jin Yoon},
year=2004
}