Title :
Unconditionally Secure Steganography Against Active Attacks
Author :
Shikata, Junji ; Matsumoto, Tsutomu
Author_Institution :
Grad. Sch. of Environ. & Inf. Sci., Yokohama Nat. Univ., Yokohama
fDate :
6/1/2008 12:00:00 AM
Abstract :
In this paper, we study unconditionally secure stegosystems against active attacks over an insecure channel in which an adversary can read and write a message. More specifically, we propose an information-theoretic model for steganography in the presence of active adversaries by extending both Simmons´ and Cachin´s works; and we show a generic construction of stegosystems secure against active attacks by using authenticated encryption in unconditional setting. Although the idea behind this construction is already used in different models (i.e., computational models and/or information-theoretic models with passive adversaries) of steganography, our contribution lies in showing the construction methodology provides provable and unconditional security against active adversaries.
Keywords :
cryptography; information theory; message authentication; telecommunication channels; active adversaries; active attacks; authenticated encryption; information-theoretic model; insecure channel; stegosystems; unconditionally secure steganography; Authentication; Computational modeling; Helium; Information security; Information theory; National security; Protocols; Public key; Public key cryptography; Steganography; Authenticated encryption; authentication code; information-theoretic security; steganography; unconditional security;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2008.921884