Electronic visual cryptography system based on secret sharing

Nowadays, provide continuous access to information which is unchanged and safely without being seized by others submission has become a necessity. In the cyber world, the peace and war has blurred in terms of the boundaries of time and space. Generally, encryption is the most widely known method in order to ensure information security. Text encryption algorithms is are widely used ones. In this study, the image data is intended to be used instead of text data. The fact that the image data is larger than text data. Photos of passwords will be distributed to more than one person and in order to occur the password in these images is a need to come together. In conclusıon, encryption is more potent and to be much more difficult to be solved. For the reasons stated above, importance of information security is rapidly increasing.In order to ensure information security, cryptography is the most commonly used method. Cryptology is a wide branch of science and is studied in two main branches. This is divided into two main branches, cryptography and cryptoanalisis. Cryptography is the art of data encryption. Cryptoanalisis determines how useful is encryption algorithm used. Secrets of sharing techniques in cryptography is one of the techniques used and aims the data to be encrypted divide and distribute to secret owner. To accomplish this goal, many studies is complited. In recent years, together with the study of secret sharing technique is supplemented with new features. These features comprises to enhance further the security of information, to reduct space of hidden data stored in the memory and the change of the parameters used. In this thesis study, cryptography methods and the secret sharing methods will be discussed in deeply. Using these techniques, a web-based security application is developed. Methods determine the advantages and disadvantages against each other and in which cases it would be more accurate idea about which method will be used. Keywords: Secret sharing, Secrets image sharing, Genetic algorithm, Threshold method, Information security, Image processing.