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TCC
2005
Springer

Public-Key Steganography with Active Attacks

14 years 5 months ago
Public-Key Steganography with Active Attacks
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 chosencovertext 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.
Michael Backes, Christian Cachin
Added 28 Jun 2010
Updated 28 Jun 2010
Type Conference
Year 2005
Where TCC
Authors Michael Backes, Christian Cachin
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