An encryption by using DNA algorithm for hiding a compressed message in image

الملخص EN

Cryptography is the main item to generate confidence and empower services in the digital technology, while Steganography has vastly expanded in digital medias.

The using of traditional protection methods does not meet the requirements of data protection in light of development hackers techniques to breach it, in addition to use encryption algorithms without shielding may not secure the data, and it has become necessary to strengthen information security in new ways by providing several levels of protection.

A proposed algorithm is used to overcome of these challenges, it encrypts a message by using DNA encryption algorithm, then multiply the output by a factor then compress the multiplying message by using GZIP algorithm, the last stage is hiding a compressed message in (LSB) image pixels.

The ratio of data compression is up to 75%.

when combining these technologies, a good results have been obtained for instance the cover image of House sample result is (SSIM (Structural Similarity Index Measure) is equal 1, PSNR (Peak Signal to Noise Ratio) is equal 68.2827, MSE (Mean Square Error) is equal 0.0028, UACI (The Unified Averaged Changed Intensity) score is 4.59072 and NPCR (Number of Pixels Change Rate) score is 0.00383).

This work contributes to reducing the risk of information breach when sending and receiving confidential information between parties.