A Review on Image Steganography
Keywords:
Image, Steganography, Cryptography, Encryption, Data hiding, LSB, DCT, Security.Abstract
There is a lot of progress in the Internet technology, there was huge text as well as multimedia data internet transfer. With this data, security is vital need. Steganography and cryptography are data security techniques. Cryptography is defined as a method of concealing information by encrypting plain texts to encrypt texts or cipher text and later transferring it to the intended recipient using an unknown key, on the other hand, Steganography provides or says that security raises to a high level; encrypted text by hiding text, image or other formats. Watermark tags and fingerprints are: the other two technologies used in parallel with steganography; in the field of data hiding. Steganography can be integrated to increase the security of encrypted data. These paper present different techniques of image steganography in spatial and frequency domain. LSB modification techniques and DCT coefficients techniques are covered along with its application.
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