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Authors: Denis Firsov 1 ; 2 ; Henri Lakk 1 ; Sven Laur 3 and Ahto Truu 1

Affiliations: 1 Guardtime, A. H. Tammsaare tee 60, 11316 Tallinn, Estonia ; 2 Tallinn University of Technology, Tallinn, Estonia ; 3 University of Tartu, Tartu, Estonia

Keyword(s): Digital Signatures, Timestamping, Hash Functions, Endorsements.

Abstract: We propose a new digital signature scheme based on combining cryptographic timestamping with an endorsement scheme, both of which can be constructed from one-way and collision-resistant hash functions. The signature scheme is efficient and allows balancing of key generation and signing time for signature size and verification time. The security analysis is based on a realistic model of timestamping. As part of our construction, we introduce the novel concept of endorsements, which may be of independent interest.

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Paper citation in several formats:
Firsov, D.; Lakk, H.; Laur, S. and Truu, A. (2021). BLT+L: Efficient Signatures from Timestamping and Endorsements. In Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT, ISBN 978-989-758-524-1; ISSN 2184-7711, pages 75-86. DOI: 10.5220/0010530000750086

@conference{secrypt21,
author={Denis Firsov. and Henri Lakk. and Sven Laur. and Ahto Truu.},
title={BLT+L: Efficient Signatures from Timestamping and Endorsements},
booktitle={Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT,},
year={2021},
pages={75-86},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010530000750086},
isbn={978-989-758-524-1},
issn={2184-7711},
}

TY - CONF

JO - Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT,
TI - BLT+L: Efficient Signatures from Timestamping and Endorsements
SN - 978-989-758-524-1
IS - 2184-7711
AU - Firsov, D.
AU - Lakk, H.
AU - Laur, S.
AU - Truu, A.
PY - 2021
SP - 75
EP - 86
DO - 10.5220/0010530000750086

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