With the development of mobile devices the security issue migrates from the PC platform to this new technology. Securing confidential information on the mobile platforms has been, is and will be a topical issue for the specialists. In this paper we propose a new solution in order to provide security of digital data that is transferred through today's available platforms for communication. We developed SmartSteg application that works on Android platform and it is able to hide and fast encrypt files using digital images of MB dimension as cover. LSB steganography is combined with a random function and symmetric key cryptography to transfer digital information, in a secure manner between smartphones that run under Android.
Cryptography and Steganography are two commonly used techniques in modern era for ensuring confidential and private communication. These techniques complete each other offering multiple layers of safety, enhancing digital information security. In this paper we analyze Smartsteg, which is a project that implements cryptography combined with steganography on mobile devices that run Android and Windows. We evaluate the performance of this project in terms of: interoperability, security, payload capacity, speed and robustness against steganalysis.
In this article, we model a variant of the well-known syndrome decoding problem as a linear optimization problem. Most common algorithms used for solving optimization problems, e.g. the simplex algorithm, fail to find a valid solution for the syndrome decoding problem over a finite field. However, our simulations prove that a slightly modified version of the syndrome decoding problem can be solved by the simplex algorithm. More precisely, the algorithm returns a valid error vector when the syndrome vector is an integer vector, i.e.,the matrix-vector multiplication, is realized over Z, instead of Fq.
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