Attribute Based Tracing for Securing Group Signatures Against Centralized Authorities

Perera, Maharage Nisansala Sevwandi; Nakamura, Tôru; Matsunaka, Takashi; Yokoyama, Haruki; Sakurai, Kouichi

doi:10.1007/978-3-031-21280-2_31

Cited by 1 publication

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this article, we combined the idea of decentralizing tracing key generation, which was delivered at ISPEC 2022, 17 and the proposal of allowing tracers to collude, which was presented at the poster session of ASIACCS 2022 18 . Moreover, we answer the problem of controlling tracers' actions, especially their collusion, which was not captured at the presentation of ASIACCS 2022.…”

Section: Discussionmentioning

confidence: 99%

“…The process and the construction of the protocol follow the same process and construction given by previous GS schemes. 2,[16][17][18] Compared to the existing schemes, the user encrypts his id, first, with the selected attribute set (A  ) and then with GM's public (encryption) key (pk e ). A signer employs encryption mechanisms of the CP-ABE scheme and PKE scheme, respectively.…”

Section: Constructionmentioning

confidence: 99%

“…ENDNOTES * In the article presented at ISPEC 2022 17 we specifically delivered a mechanism for decentralizing the key-generation of tracers in GS and showed a tracing method from ABE. † At ASIACCS 2022 18 we presented our idea allowing tracers to collaborate to satisfy the access policy of given group signature to identify the signer.…”

Section: Data Availability Statementmentioning

confidence: 99%

“…Then the user selects his public and secret signing keys

{\mathbf{pk}}_u,{\mathbf{sk}}_u

and produces

{sig}_i

to interact with GM via Join‐Issue user‐join protocol. The process and the construction of the protocol follow the same process and construction given by previous GS schemes 2,16–18 . Compared to the existing schemes, the user encrypts his id, first, with the selected attribute set (

𝔸_{𝒲}

) and then with GM's public (encryption) key (

{\mathbf{pk}}_e

).…”

Section: Constructionmentioning

confidence: 99%

“…** In the article presented at ISPEC 2022 17 we specifically delivered a mechanism for decentralizing the key‐generation of tracers in GS and showed a tracing method from ABE.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Secured tracing for group signatures from attribute‐based encryption

Perera,

Matsunaka,

Yokoyama

et al. 2023

Concurrency and Computation

Self Cite

View full text Add to dashboard Cite

SummaryThis article presents a tracing mechanism for group signatures answering the security threats of malicious authorities and users' forgeries. The proposal weakens the high trust placed on the centralized tracing party in previous group signatures by decentralizing tracing power using a multiple tracer setting and limiting the tracers' access using attribute‐based encryption and the requirement of the group manager's agreement. We allow the group manager to control tracers identifying his group users. Instead of a centralized tracer, our setting has multiple tracers possessing attribute sets. Thus, after getting the group manager's permission, a tracer should satisfy the access policy in a given signature to identify the signer. On the other hand, our group signature scheme decentralizes the tracing key generation and removes the group manager's tracing ability. Thus, it ensures that only the attribute‐satisfying and permitted tracers can identify the signer. Moreover, this article delivers security against malicious users. It presents a verification process of access policy of the signatures to prevent users from utilizing invalid attributes for signing. In addition, the article delivers a collaborative tracing mechanism to satisfy attribute sets that a tracer fails to fulfill alone for identifying a signer. Thus, our tracing mechanism ensures security against malicious authorities and group users in group signatures. The article gives the general construction of the scheme and discusses the security.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Constructionmentioning

confidence: 99%

Section: Data Availability Statementmentioning

confidence: 99%

“…Then the user selects his public and secret signing keys

{\mathbf{pk}}_u,{\mathbf{sk}}_u

and produces

{sig}_i

𝔸_{𝒲}

) and then with GM's public (encryption) key (

{\mathbf{pk}}_e

).…”

Section: Constructionmentioning

confidence: 99%

“…** In the article presented at ISPEC 2022 17 we specifically delivered a mechanism for decentralizing the key‐generation of tracers in GS and showed a tracing method from ABE.…”

mentioning

confidence: 99%

See 3 more Smart Citations