Improvement of a convertible undeniable partially blind signature scheme

Undeniable signatures are the digital signatures that should be verified with the help of the signer. A signer may disavow a genuine document, if the signature is only verifiable with the aid of the signer under the condition that the signer is not honest. Undeniable signatures solve this problem by...

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Bibliographic Details
Main Authors:	Han, Song, Chang, Elizabeth, Dillon, Tharam S., Wang, J.
Format:	Conference Paper
Published:	IEEE Computer Society Press 2006
Subjects:	Security protocol Partially blind signature Blind signature Convertible undeniable signature Undeniable signature
Online Access:	http://hdl.handle.net/20.500.11937/42625

id	curtin-20.500.11937-42625
recordtype	eprints
spelling	curtin-20.500.11937-426252017-01-30T15:00:53Z Improvement of a convertible undeniable partially blind signature scheme Han, Song Chang, Elizabeth Dillon, Tharam S. Wang, J. Security protocol Partially blind signature Blind signature Convertible undeniable signature Undeniable signature Undeniable signatures are the digital signatures that should be verified with the help of the signer. A signer may disavow a genuine document, if the signature is only verifiable with the aid of the signer under the condition that the signer is not honest. Undeniable signatures solve this problem by adding a new feature called the disavowal protocol in addition to the normal components of signature and verification. Disavowal protocol is able to prevent a dishonest signer from disavowing a valid signature. In some situations, an undeniable signature should be converted into a normal digital signature in order that the signature can be universally verified. Blind signatures are the digital signatures that help a user to get a signature on a message without revealing the content of the message to a signer. For the blind signatures, if the signer is able to make an agreement with the user, then the underlying signer may include some common information that is known to the user, then such signatures are partially blind signatures. Convertible undeniable partially blind signatures are of the features of undeniable signatures, blind signatures, convertible undeniable signatures, and partially blind signatures. Recently, a convertible undeniable partially blind signature scheme was presented. In this paper, we first analyse a security flaw of the convertible undeniable partially blind signature scheme. To address the security flaw, we present an improvement on the disavowal protocol. The improved scheme can prevent the signer from either proving that a given valid signature as invalid, or cheating the verifier. 2006 Conference Paper http://hdl.handle.net/20.500.11937/42625 IEEE Computer Society Press fulltext
repository_type	Digital Repository
institution_category	Local University
institution	Curtin University Malaysia
building	Curtin Institutional Repository
collection	Online Access
topic	Security protocol Partially blind signature Blind signature Convertible undeniable signature Undeniable signature
spellingShingle	Security protocol Partially blind signature Blind signature Convertible undeniable signature Undeniable signature Han, Song Chang, Elizabeth Dillon, Tharam S. Wang, J. Improvement of a convertible undeniable partially blind signature scheme
description	Undeniable signatures are the digital signatures that should be verified with the help of the signer. A signer may disavow a genuine document, if the signature is only verifiable with the aid of the signer under the condition that the signer is not honest. Undeniable signatures solve this problem by adding a new feature called the disavowal protocol in addition to the normal components of signature and verification. Disavowal protocol is able to prevent a dishonest signer from disavowing a valid signature. In some situations, an undeniable signature should be converted into a normal digital signature in order that the signature can be universally verified. Blind signatures are the digital signatures that help a user to get a signature on a message without revealing the content of the message to a signer. For the blind signatures, if the signer is able to make an agreement with the user, then the underlying signer may include some common information that is known to the user, then such signatures are partially blind signatures. Convertible undeniable partially blind signatures are of the features of undeniable signatures, blind signatures, convertible undeniable signatures, and partially blind signatures. Recently, a convertible undeniable partially blind signature scheme was presented. In this paper, we first analyse a security flaw of the convertible undeniable partially blind signature scheme. To address the security flaw, we present an improvement on the disavowal protocol. The improved scheme can prevent the signer from either proving that a given valid signature as invalid, or cheating the verifier.
format	Conference Paper
author	Han, Song Chang, Elizabeth Dillon, Tharam S. Wang, J.
author_facet	Han, Song Chang, Elizabeth Dillon, Tharam S. Wang, J.
author_sort	Han, Song
title	Improvement of a convertible undeniable partially blind signature scheme
title_short	Improvement of a convertible undeniable partially blind signature scheme
title_full	Improvement of a convertible undeniable partially blind signature scheme
title_fullStr	Improvement of a convertible undeniable partially blind signature scheme
title_full_unstemmed	Improvement of a convertible undeniable partially blind signature scheme
title_sort	improvement of a convertible undeniable partially blind signature scheme
publisher	IEEE Computer Society Press
publishDate	2006
url	http://hdl.handle.net/20.500.11937/42625
first_indexed	2018-09-06T23:22:09Z
last_indexed	2018-09-06T23:22:09Z
_version_	1610902279109476352

Improvement of a convertible undeniable partially blind signature scheme

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