A Review on Various Digital Image Encryption Techniques and Security Criteria

mages excessively contribute to communication in this era of multimedia. When a user transfers images over an unsecured communication network, then the absolute protection is a challenging issue to conserve the confidentiality of images. Encryption is a method of retaining the secrecy of images. This paper provides the succinct introduction to the cryptography, moreover, includes a concise description of various elemental securities' criteria of the image encryption algorithms. This work presents the survey of diverse image encryption techniques and comparison of discrete image encoding approaches, at last discloses a conclusion and suggests future works. General Terms Image security, image encryption, image processing. Keywordsncrypted image; histogram; image, image encryption; image security parameters; permutation and substitution; scrambling, XOR operation.

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