Supersingular Isogeny-Based Designated Verifier Blind Signature

Rajeev Anand Sahu; Agnese Gini; Ankan Pal

Paper 2019/1498 Original: eprint.iacr.org/2019/1498 ↗

Supersingular Isogeny-Based Designated Verifier Blind Signature

Rajeev Anand Sahu

Agnese Gini

Ankan Pal

Abstract

Recently, Srinath and Chandrasekaran have proposed an undeniable blind signature scheme (UBSS) from supersingular isogeny to provide signer’s control in a quantum-resistant blind signature. However, certain weaknesses of undeniable signature have already been observed and have been overcome by formalizing the designated verifier signature (DVS). In this paper, we explore the possibility of generic construction of a DVS from hard homogeneous spaces. Further, following this motivation, we realize a quantum-resistant designated verifier blind signature (DVBS) scheme based on supersingular isogenies from the proposed generic construction. In contrast to the UBSS, our construction do not require interactive communication between the signer and the verifier, yet engages the signer in the verification. The compact signature adds more security properties in a quantum-resistant blind signature to be useful in specific applications including electronic tendering, online auctions etc.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2019-12-30: last updated; 2019-12-30: published
Short URL: https://ia.cr/2019/1498
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2019/1498,
      author = {Rajeev Anand Sahu and Agnese Gini and Ankan Pal},
      title = {Supersingular Isogeny-Based Designated Verifier Blind Signature},
      howpublished = {Cryptology {ePrint} Archive, Paper 2019/1498},
      year = {2019},
      url = {https://eprint.iacr.org/2019/1498}
}