Forward Secure Ring Signature without Random Oracles

Liu, Joseph K.; Yuen, Tsz Hon; Zhou, Jianying

doi:10.1007/978-3-642-25243-3_1

Cited by 23 publications

(10 citation statements)

References 27 publications

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“…In particular, Vehicular Ad Hoc Networks (VANET) (a kind of ad hoc network specifically designed for vehicles) can also deploy ring signatures for authentication purposes [17]. 3) Smart Grid Security [45]: The smart grid is a new form of electricity network. One of the distinctive features in a smart grid is its capabilities for two-way data communication.…”

Section: A Related Cryptographic Notionsmentioning

confidence: 99%

Realizing Fully Secure Unrestricted ID-Based Ring Signature in the Standard Model Based on HIBE

Liu

Susilo

et al. 2013

IEEE Trans.Inform.Forensic Secur.

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. (2013). Realizing fully secure unrestricted ID-based ring signature in the standard model based on HIBE. IEEE Transactions on Information Forensics and Security, 8 (12), 1909-1922. Realizing fully secure unrestricted ID-based ring signature in the standard model based on HIBE AbstractWe describe a secure and unrestricted identity-based ring signature scheme in the standard model. Our construction is provably fully secure in the standard model under static assumptions and is motivated by an existing HIBE scheme. Our observation on the relationship between ID-based ring signatures and HIBE is of interest to researchers in other fields as well. Following the strongest anonymity definition in ring signatures, we define a new level of anonymity for ID-based ring signatures in which the attacker can specify the randomness used in the creation of the user secret key, in addition to the private key generators master key. Our scheme provides unconditional anonymity in this model. Abstract-We describe a secure and unrestricted identity-based ring signature scheme in the standard model. Our construction is provably fully secure in the standard model under static assumptions and is motivated by an existing HIBE scheme. Our observation on the relationship between ID-based ring signatures and HIBE is of interest to researchers in other fields as well. Following the strongest anonymity definition in ring signatures, we define a new level of anonymity for ID-based ring signatures in which the attacker can specify the randomness used in the creation of the user secret key, in addition to the PKG's master key. Our scheme provides unconditional anonymity in this model.

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Section: A Related Cryptographic Notionsmentioning

confidence: 99%

Realizing Fully Secure Unrestricted ID-Based Ring Signature in the Standard Model Based on HIBE

Liu

Susilo

et al. 2013

IEEE Trans.Inform.Forensic Secur.

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“…REVIEW OF THE LYZ RING SIGNATURE SCHEME In the LYZ ring signature [10], all users' keys are defined in a group G of composite order N . That group must be set up by a trusted authority, since the factorization of its order N must be kept secret.…”

Section: Preliminarymentioning

confidence: 99%

“…Remark 1. In order to prove the anonymity of LYZ signature scheme, the authors have to use the Subgroup Decision Assumption [10] with respect to the group G of composite order N . To the contrary, it just shows that the authority can trace out the real signer.…”

Section: A the Lyz Ring Signature Is Not Anonymousmentioning

confidence: 99%

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Modification of One Forward Secure Ring Signature Scheme Based on Bilinear Groups of Composite Order

Cao

2013

2013 International Conference on Cloud and Service Computing

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We show that the authority in the forward secure ring signature scheme, proposed by Liu et al. (ICICS'2011), can trace out the real signer of a signature/message pair. The weakness is due to that the signature scheme is based on bilinear groups of composite order, instead of the usual groups of prime order. We remark that the usual bilinear groups of prime order are sufficient for the construction. We will present a modification of the scheme and show its security. We also remark that the structure of bilinear groups of a large composite order could make group operation inefficient and lose the advantages of elliptic curve cryptography which gained mainly from smaller parameter size. From the practical point of view, such an algebraic structure is unlikely applicable to cryptographic schemes.

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“…Applications of ring signature schemes include whistle blowing [1], anonymous membership authentication for ad hoc groups [11], non-interactive deniable ring authentication [12], smart grid systems [13], perfect concurrent signature [14] and multi-designated verifiers signature [15].…”

Section: Introductionmentioning

confidence: 99%

Efficient Linkable and/or Threshold Ring Signature Without Random Oracles

Yuen

Liu

et al. 2012

The Computer Journal

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Linkable ring signatures have found many attractive applications. One of the recent important extensions is a linkable threshold ring signature (LTRS) scheme. Unfortunately, the existing LTRS schemes are only secure in the random oracle model (ROM). In this paper, we make the following contributions. First, we construct the first LTRS scheme that is secure without requiring the ROM. Further, we enhance the security of a threshold ring signature (for both linkable or non-linkable) by providing a stronger definition of anonymity. This strengthened notion makes threshold ring signature schemes more suitable in real life. Finally, we provide efficient schemes that outperform the existing schemes in the literature. Our scheme is particularly suitable for electronic commerce or electronic government where anonymity and accountability are the most concerned factors. © 2012 The Author.

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Forward Secure Ring Signature without Random Oracles

Cited by 23 publications

References 27 publications

Realizing Fully Secure Unrestricted ID-Based Ring Signature in the Standard Model Based on HIBE

Realizing Fully Secure Unrestricted ID-Based Ring Signature in the Standard Model Based on HIBE

Modification of One Forward Secure Ring Signature Scheme Based on Bilinear Groups of Composite Order

Efficient Linkable and/or Threshold Ring Signature Without Random Oracles

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