Verifiably encrypted group signatures

Zhen Wang; Xiling Luo; Qianhong Wu

doi:10.1007/978-3-319-68637-0_7

Verifiably encrypted group signatures

Zhen Wang
, Xiling Luo
, Qianhong Wu^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Scopus citations

Abstract

Recently, verifiably encrypted signatures (VESs) have been widely used in fair exchange, however most of them do not provide a method to protect the anonymity of the signer, leading to privacy leakage in fair exchange. Verifiably Encrypted Group Signature (VEGS) overcomes drawbacks of VES, which allows a verifier to check its validity without decryption. And VEGS does not reveal the identity of the signer, thus protecting the privacy of the signer. In VEGS systems, a signer generates a group signature with his private key, then encrypts it with the adjudicator’s public key and outputs a VEGS. A verifier can check whether a VEGS is valid. The group manager reveals the identity of the VEGS if necessary. The adjudicator can extract the original group signature from the VEGS with his private key. In this paper, we propose the first concrete VEGS scheme according to our model. We define several security properties which are essential to VEGS schemes and we prove that our scheme is secure in the standard model. Additionally, we discuss some relevant issues about our scheme.

Original language	English
Title of host publication	Provable Security - 11th International Conference, ProvSec 2017, Proceedings
Editors	Tatsuaki Okamoto, Yong Yu, Man Ho Au, Yannan Li
Publisher	Springer Verlag
Pages	107-126
Number of pages	20
ISBN (Print)	9783319686363
DOIs	https://doi.org/10.1007/978-3-319-68637-0_7
State	Published - 2017
Event	11th International Conference on Provable Security, ProvSec 2017 - Xi'an, China Duration: 23 Oct 2017 → 25 Oct 2017

Publication series

Name	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume	10592 LNCS
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	11th International Conference on Provable Security, ProvSec 2017
Country/Territory	China
City	Xi'an
Period	23/10/17 → 25/10/17

Keywords

Group signature
Security properties
Verifiably encrypted group signature
Verifiably encrypted signature

Access to Document

10.1007/978-3-319-68637-0_7

Cite this

Wang, Z., Luo, X., & Wu, Q. (2017). Verifiably encrypted group signatures. In T. Okamoto, Y. Yu, M. H. Au, & Y. Li (Eds.), Provable Security - 11th International Conference, ProvSec 2017, Proceedings (pp. 107-126). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10592 LNCS). Springer Verlag. https://doi.org/10.1007/978-3-319-68637-0_7

Wang, Zhen ; Luo, Xiling ; Wu, Qianhong. / Verifiably encrypted group signatures. Provable Security - 11th International Conference, ProvSec 2017, Proceedings. editor / Tatsuaki Okamoto ; Yong Yu ; Man Ho Au ; Yannan Li. Springer Verlag, 2017. pp. 107-126 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

@inproceedings{7bb9090ed44d43f5be37348ee70b062a,

title = "Verifiably encrypted group signatures",

abstract = "Recently, verifiably encrypted signatures (VESs) have been widely used in fair exchange, however most of them do not provide a method to protect the anonymity of the signer, leading to privacy leakage in fair exchange. Verifiably Encrypted Group Signature (VEGS) overcomes drawbacks of VES, which allows a verifier to check its validity without decryption. And VEGS does not reveal the identity of the signer, thus protecting the privacy of the signer. In VEGS systems, a signer generates a group signature with his private key, then encrypts it with the adjudicator{\textquoteright}s public key and outputs a VEGS. A verifier can check whether a VEGS is valid. The group manager reveals the identity of the VEGS if necessary. The adjudicator can extract the original group signature from the VEGS with his private key. In this paper, we propose the first concrete VEGS scheme according to our model. We define several security properties which are essential to VEGS schemes and we prove that our scheme is secure in the standard model. Additionally, we discuss some relevant issues about our scheme.",

keywords = "Group signature, Security properties, Verifiably encrypted group signature, Verifiably encrypted signature",

author = "Zhen Wang and Xiling Luo and Qianhong Wu",

note = "Publisher Copyright: {\textcopyright} 2017, Springer International Publishing AG.; 11th International Conference on Provable Security, ProvSec 2017 ; Conference date: 23-10-2017 Through 25-10-2017",

year = "2017",

doi = "10.1007/978-3-319-68637-0\_7",

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Wang, Z, Luo, X & Wu, Q 2017, Verifiably encrypted group signatures. in T Okamoto, Y Yu, MH Au & Y Li (eds), Provable Security - 11th International Conference, ProvSec 2017, Proceedings. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 10592 LNCS, Springer Verlag, pp. 107-126, 11th International Conference on Provable Security, ProvSec 2017, Xi'an, China, 23/10/17. https://doi.org/10.1007/978-3-319-68637-0_7

Verifiably encrypted group signatures. / Wang, Zhen; Luo, Xiling ; Wu, Qianhong.
Provable Security - 11th International Conference, ProvSec 2017, Proceedings. ed. / Tatsuaki Okamoto; Yong Yu; Man Ho Au; Yannan Li. Springer Verlag, 2017. p. 107-126 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10592 LNCS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Verifiably encrypted group signatures

AU - Wang, Zhen

AU - Luo, Xiling

AU - Wu, Qianhong

PY - 2017

Y1 - 2017

N2 - Recently, verifiably encrypted signatures (VESs) have been widely used in fair exchange, however most of them do not provide a method to protect the anonymity of the signer, leading to privacy leakage in fair exchange. Verifiably Encrypted Group Signature (VEGS) overcomes drawbacks of VES, which allows a verifier to check its validity without decryption. And VEGS does not reveal the identity of the signer, thus protecting the privacy of the signer. In VEGS systems, a signer generates a group signature with his private key, then encrypts it with the adjudicator’s public key and outputs a VEGS. A verifier can check whether a VEGS is valid. The group manager reveals the identity of the VEGS if necessary. The adjudicator can extract the original group signature from the VEGS with his private key. In this paper, we propose the first concrete VEGS scheme according to our model. We define several security properties which are essential to VEGS schemes and we prove that our scheme is secure in the standard model. Additionally, we discuss some relevant issues about our scheme.

AB - Recently, verifiably encrypted signatures (VESs) have been widely used in fair exchange, however most of them do not provide a method to protect the anonymity of the signer, leading to privacy leakage in fair exchange. Verifiably Encrypted Group Signature (VEGS) overcomes drawbacks of VES, which allows a verifier to check its validity without decryption. And VEGS does not reveal the identity of the signer, thus protecting the privacy of the signer. In VEGS systems, a signer generates a group signature with his private key, then encrypts it with the adjudicator’s public key and outputs a VEGS. A verifier can check whether a VEGS is valid. The group manager reveals the identity of the VEGS if necessary. The adjudicator can extract the original group signature from the VEGS with his private key. In this paper, we propose the first concrete VEGS scheme according to our model. We define several security properties which are essential to VEGS schemes and we prove that our scheme is secure in the standard model. Additionally, we discuss some relevant issues about our scheme.

KW - Group signature

KW - Security properties

KW - Verifiably encrypted group signature

KW - Verifiably encrypted signature

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U2 - 10.1007/978-3-319-68637-0_7

DO - 10.1007/978-3-319-68637-0_7

M3 - 会议稿件

AN - SCOPUS:85032699324

SN - 9783319686363

T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

SP - 107

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BT - Provable Security - 11th International Conference, ProvSec 2017, Proceedings

A2 - Okamoto, Tatsuaki

A2 - Yu, Yong

A2 - Au, Man Ho

A2 - Li, Yannan

PB - Springer Verlag

T2 - 11th International Conference on Provable Security, ProvSec 2017

Y2 - 23 October 2017 through 25 October 2017

ER -

Wang Z, Luo X , Wu Q. Verifiably encrypted group signatures. In Okamoto T, Yu Y, Au MH, Li Y, editors, Provable Security - 11th International Conference, ProvSec 2017, Proceedings. Springer Verlag. 2017. p. 107-126. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)). doi: 10.1007/978-3-319-68637-0_7

Verifiably encrypted group signatures

Abstract

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Keywords

Access to Document

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