Sanitizable sgnatures with srong tansparency in the sandard model

Authors:
Shivank Agrawal;Swarun Kumar;Amjed Shareef;C. Pandu Rangan
Affiliations:
Department of Computer Science and Engineering, Indian Institute of Technology Madras, India;Department of Computer Science and Engineering, Indian Institute of Technology Madras, India;Department of Computer Science and Engineering, Indian Institute of Technology Madras, India;Department of Computer Science and Engineering, Indian Institute of Technology Madras, India
Venue:
Inscrypt'09 Proceedings of the 5th international conference on Information security and cryptology
Year:
2009

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Abstract

Sanitizable signatures provide several security features which are useful in many scenarios including military and medical applications. Sanitizable signatures allow a semi-trusted party to update some part of the digitally signed document without interacting with the original signer. Such schemes, where the verifier cannot identify whether the message has been sanitized, are said to possess strong transparency. In this paper, we have described the first efficient and provably secure sanitizable signature scheme having strong transparency under the standard model.