Public-Key Steganography with Active Attacks

Michael Backes; Christian Cachin

Paper 2003/231

Public-Key Steganography with Active Attacks

Michael Backes and Christian Cachin

Abstract

A complexity-theoretic model for public-key steganography with active attacks is introduced. The notion of steganographic security against adaptive chosen-covertext attacks (SS-CCA) and a relaxation called steganographic security against publicly-detectable replayable adaptive chosen-covertext attacks (SS-PDR-CCA) are formalized. These notions are closely related to CCA-security and PDR-CCA-security for public-key cryptosystems. In particular, it is shown that any SS-(PDR-)CCA stegosystem is a (PDR-)CCA-secure public-key cryptosystem and that an SS-PDR-CCA stegosystem can be realized from any PDR-CCA-secure public-key cryptosystem with pseudorandom ciphertexts.

Metadata

Available format(s): PDF PS
Category: Foundations
Publication info: Published elsewhere. Unknown where it was published
Keywords: steganography information hiding public-key cryptography
Contact author(s): cca @ zurich ibm com
History: 2004-08-26: last of 3 revisions; 2003-11-06: received; See all versions
Short URL: https://ia.cr/2003/231
License: CC BY

BibTeX

@misc{cryptoeprint:2003/231,
      author = {Michael Backes and Christian Cachin},
      title = {Public-Key Steganography with Active Attacks},
      howpublished = {Cryptology {ePrint} Archive, Paper 2003/231},
      year = {2003},
      url = {https://eprint.iacr.org/2003/231}
}