Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

2013

Abstract

Sanitizable signature (SS) allows a signer to partly delegate signing rights to a predetermined party, called sanitizer, who can later modify certain designated parts of a message originally signed by the signer and generate a new signature on the sanitized message without interacting with the signer. One of the important security requirements of sanitizable signatures is accountability, which allows the signer to prove, in case of dispute, to a third party that a message was modified by the sanitizer. Trapdoor sanitizable signature (TSS) enables a signer of a message to delegate the power of sanitization to any parties at anytime but at the expense of losing the accountability property. In this paper, we introduce the notion of accountable trapdoor sanitizable signature (ATSS) which lies between SS and TSS. As a building block for constructing ATSS, we also introduce the notion of accountable chameleon hash (ACH), which is an extension of chameleon hash (CH) and might be of independent interest. We propose a concrete construction of ACH and show how to use it to construct an ATSS scheme.

Keywords

Trapdoor Sanitizable Signature, Accountability, Chameleon Hash

Discipline

Information Security

Research Areas

Information Security and Trust

Publication

Information Security Practice and Experience: 9th International Conference, ISPEC 2013, Lanzhou, China, May 12-14, 2013: Proceedings

Volume

7863

First Page

117

Last Page

131

ISBN

9783642380334

Identifier

10.1007/978-3-642-38033-4_9

Publisher

Springer Verlag

City or Country

Lanzhou, China

Additional URL

http://dx.doi.org/10.1007/978-3-642-38033-4_9

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