J. A. O'Sullivan, "Some properties of optimal information hiding and information attacks," in Proc. of the Allerton Conf. on Comm., Control and Computing, 2001.  Home/Search   Document Not in Database   Summary   Related Articles

....] and is assumed finite. Equality is achieved in both (31) and (32) if the covertext is zero mean i.i.d. Gaussian. Note that for a zero mean variance # 2 u i.i.d. Gaussian covertext, Theorem 2. 4 di#ers from the initial results of Moulin and O Sullivan [8, 9] but agrees with an updated version [28]. In our 19 notation, the results of [8, 9] can be expressed as 1 2 log(1 s(A; D 1 , D 2 , # 2 u ) where the parameter A is fixed to # 2 u D 1 , rather than, as in (8) being optimized over A # A(D 1 , D 2 , # 2 u ) The value # 2 u D 1 is not the optimal choice for A # ....

....n for every A # A(D 1 , D 2 , # 2 u ) where P A Y X is defined in Section 3.1. The value of the game is thus C # (D 1 , D 2 , # 2 u ) as we have demonstrated above. Using the above concepts, we now discuss the value of this game that was initially given in [8, 9] and later revised in [28]. For A 0 = # 2 u D 1 , I priv # (P G U ) n , P X U , P A 0 Y X ) n # # I priv # (P G U ) n , P A 0 X U ) n , P A 0 Y X ) n # , 49) for every P X U # D 1 (D 1 , P G U ) n ) and I priv # (P G U ) n , P A 0 X U ) n , P A 0 Y X ) n # ....

J. A. O'Sullivan, "Some properties of optimal information hiding and information attacks," in Proc. of the Allerton Conf. on Comm., Control and Computing, 2001.

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