Journal
IEEE ACCESS
Volume 9, Issue -, Pages 78017-78024Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3083529
Keywords
Security; Elliptic curves; Blindness; Protocols; Elliptic curve cryptography; Additives; Privacy; Partially blind signature; identity-based cryptography; elliptic curve; random oracle; tampering
Categories
Funding
- National Natural Science Foundation of China [61962011]
- Guizhou Provincial Science and Technology Foundation [[2019]1434]
- 2019 Academic New Seedling Cultivation And Innovative Exploration Special Project of Guizhou Normal University
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Blind signatures prevent users from abusing their rights, while partial blind signatures allow signers to embed public information without losing blindness. The new scheme proposed in this paper offers a more secure solution under the assumption of a difficult problem, without using pairing operations and with lower computational cost.
Blind signature is a special type of digital signature, the signer cannot see the specific content signed. However, blindness may cause users to abuse their rights. Partial blind signature allows the signer to embed pre-negotiated public information in the blind signature without losing blindness, which can prevent users from abusing their rights. Islam et al. presented an identity-based partial blind signature scheme and claimed that it is provable secure. However, in this paper we proved that the scheme is vulnerable against the tampering attacks with public information. We then proposed a new identity-based partial blind signature scheme, showed the security proofs under the assumption that the elliptic curve discrete logarithm problem (ECDLP) is difficult. The new scheme does not use pairing operations and enjoys less computation cost.
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