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Public-Key Steganography with Active Attacks
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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. |
BibTeX
@misc{eprint-2003-11944, title={Public-Key Steganography with Active Attacks}, booktitle={IACR Eprint archive}, keywords={foundations / steganography, information hiding, public-key cryptography}, url={http://eprint.iacr.org/2003/231}, note={ cca@zurich.ibm.com 12656 received 6 Nov 2003, last revised 26 Aug 2004}, author={Michael Backes and Christian Cachin}, year=2003 }