This paper devotes itself to the study of secret message delivery using cover image and introduces a novel steganographic technique based on genetic algorithm to find a near-optimum structure for the pair-wise least-significant-bit (LSB) matching scheme. A survey of the related literatures shows that the LSB matching method developed by Mielikainen, employs a binary function to reduce the numbe...

In this study, a novel approach which uses combination of steganography and cryptography for hiding information into digital images as host media is proposed. In the process, secret data is first encrypted using the mono-alphabetic substitution cipher method and then the encrypted secret data is embedded inside an image using an algorithm which combines the random patterns based on Space Fillin...

Steganography is the science of writing hidden messages is such a way that no one except sender and intended recipient can realize there is a hidden message. Compared with cryptography we can say that, steganography’s in security work as supplement to cryptography, not replace it. So to add another layer of protection we can encrypt the hidden message (Johnson & Jajodia, 1998). A survey of curr...

We present several attacks on RSA that factor the modulus in polynomial time under the condition that a fraction of the most significant bits or least significant bits of the private exponent is available to the attacker. Our new attacks on RSA are the first attacks of this type that work up to full size public or private exponent.

 ñòàòüå ïðåäëîæåí ìåòîä âûÿâëåíèÿ ñòåãàíîãðàôè÷åñêèõ âñòàâîê, ôîðìèðóåìûõ ñ ïîìîùüþ ïîäìåíû íàèìåíåå çíà÷àùåãî áèòà (LSB). Îáíàðóæåíèå îñóùåñòâëÿåòñÿ ñ ïîìîùüþ ðàçáèåíèÿ èçîáðàæåíèÿ íà ñëîè è àíàëèçà îêðóæåíèÿ êàæäîãî áèòà ìëàäøåãî ñëîÿ. Àíàëèçèðóþòñÿ òàêæå áèòû ðàñïîëîæåííûå íàä èññëåäóåìûì áèòîì â äâóõ âûøåëåæàùèõ ñëîÿõ. Äëÿ ïðèíÿòèÿ ðåøåíèÿ î ïîäìåíå êîíêðåòíîãî áèòà èñïîëüçóåòñÿ ìåòîä àíàë...

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