Steganalysis Based on Statistical Properties of the Encrypted Messages

Optimization of Code Parameters and Signal Processing Mode under Intentional Interference

“…Данный метод СГА был впервые предложен и описан в работе [4]. Он базируется на следующем достаточно очевидном факте: информация, извлекаемая по известному алгоритму из предполагаемой СГ, представляет собой криптограмму и по-этому, в случае шифрования сообщения перед вложением стойким шифром, последовательности извлекаемых бит должны удовлетворять известным NIST-тестам на псевдослучайность; если же вложение в ПО не выполнялось, то извлекаемые последовательности бит не будут (хотя бы частично) удовлетворять NIST-тестам.…”

Side Attacks on Stegosystems Executing Message Encryption Previous to Embedding

“…A new stegoanalytic algorithm has been proposed in [10]. It is based on the side information to which the messages are subjected, with encryption using a strong block cipher previous to embedding.…”

“…Similarly to an approach presented in [10] we are going to consider also a method of SVM-based classification with the use of p-values as the results of NIST tests. But in contrast to [10], we consider the most power steganographic algorithm HUGO [12] and include also a search of stego key for it.…”

“…Similarly to an approach presented in [10] we are going to consider also a method of SVM-based classification with the use of p-values as the results of NIST tests. But in contrast to [10], we consider the most power steganographic algorithm HUGO [12] and include also a search of stego key for it. [12]) is the following: for a given bit sequence m, intended to be embedded into CO, and a given sequence of the least significant bits (LSB) , find the LSB sequence after embedding, which satisfies the equation:…”