Group Signatures with Designated Traceability

Anada, Hiroaki; Fukumitsu, Masayuki; Hasegawa, Shingo

doi:10.1109/candar53791.2021.00017

Cited by 4 publications

(12 citation statements)

References 16 publications

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“…to the existing schemes. For instance the tracing scheme proposed by Anada et al 16 has an efficient signing mechanism compared to our proposal.…”

Section: Performance Against Securitymentioning

confidence: 93%

“…Figures 3 and 4 show the construction of algorithms of user-joining and tracer key generation protocols, respectively. For the building of the scheme we referred to the construction given by Bellare et al 2 and Anada et al 16,20 The algorithm Setup produces public and secret keys for the attributes in the universal attribute set Att. We assume the tracers will receive attribute-secret keys only for their possessing attributes.…”

Section: Constructionmentioning

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%

“…In 2021, Anada et al 16 presented a function of designated traceability for group signatures with a multiple tracer setting and a tracing mechanism based on ABE. Instead of using the tracer's public key for encrypting the signer's ID, a set of attributes (an access policy) is used.…”

Section: Introductionmentioning

confidence: 99%

“…The interactive protocol for user-joining with algorithms Join and Issue is executed by a new user u with the valid long-term public and private keys upk[u], usk[u], and GM respectively. At the end of the successful execution of the protocol, GM saves accepted user details in a registration table reg and the accepted user computes a secret signing key ssk[u] 2,16.…”

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

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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.

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“…to the existing schemes. For instance the tracing scheme proposed by Anada et al 16 has an efficient signing mechanism compared to our proposal.…”

Section: Performance Against Securitymentioning

confidence: 93%