Cryptography is the practice of securing information through use codes, ciphers, and other methods encryption. It an essential aspect modern communication, enabling secure transmission data over networks protecting sensitive from unauthorized access. has been used throughout history to protect messages interception decipherment. In ancient times, cryptography was by military leaders diplomats c...

We analyze the text of an article that appeared in this journal in 2007, publishing the results of a questionnaire in which a number of experts was asked to define the concepts of Data, Information, and Knowledge. We apply standard Information Retrieval techniques to build a list of the most frequent terms in each set of definitions. We then apply Information Extraction techniques to analyze ho...

An information–theoretic analysis of information hiding is presented in this paper, forming the theoretical basis for design of information–hiding systems. Information hiding is an emerging research area which encompasses applications such as copyright protection for digital media, watermarking, fingerprinting, and steganography. In these applications, information is hidden within a host data s...