Abstract
This paper describes an extension to Portable Document Format (PDF) signatures to facilitate the long term validity of electronic documents. It presents the work of ETSI (European Telecommunications Standards Institute) published summer 2009, in ETSI TS 102 778, aiming towards an extension to the ISO 32 000-1 PDF standard.
The paper describes the problems with assuring the authenticity of a signed document over long periods (from about 1 year onwards) and outlines how these issues can be resolved using the PDF extensions for Long Term Validation (LTV).
The LTV extension is specified as part of a series of profiles for PDF Advanced Electronic Signatures (PAdES) recently published by ETSI [ETSIPAdES].
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References
EU COUNCIL DIRECTIVE 2006/112/EC of 28 November 2006 on the common system of value added tax.
EU DIRECTIVE 1999/93/EC of the European Parliament and of the Council of 13 December 1999 on a Community framework for electronic signatures
ETSI TS 102 778 (2009-07) Electronic Signatures and Infrastructures (ESI); PDF Advanced Elec-tronic Signature Profiles; Part 1 to 5; July 2009
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R. Housley, IETF RFC 3852 Cryptographic Message Syntax (CMS), July 2004
ETSI TS 101 903 (2009-06) XML Advanced Electronic Signatures (XAdES)
ETSI TS 101 903 (2009-06) XML Advanced Electronic Signatures (XAdES)
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Xiaoyun Wang and Hongbo Yu, How to Break MD5 and Other Hash Functions, Eurocrypt 2005
Adobe XML Architecture, Forms Architecture (XFA) Specification, version 2.5, (June 2007), Adobe Systems Incorporated.
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Pope, N. (2010). Protecting Long Term Validity of PDF documents with PAdES-LTV. In: Pohlmann, N., Reimer, H., Schneider, W. (eds) ISSE 2009 Securing Electronic Business Processes. Vieweg+Teubner. https://doi.org/10.1007/978-3-8348-9363-5_32
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DOI: https://doi.org/10.1007/978-3-8348-9363-5_32
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