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Vol. 8, Issue 3 (2019)

Image encryption using block based transformation algorithm

Afseen Bano and Prateek Singh
Digital images are widely communicated over the Internet. The security of digital images is an essential and challenging task on shared communication channel. Various techniques are used to secure the digital image, such as encryption, steganography and watermarking. These are the methods for the security of digital images to achieve security goals, i.e. confidentiality, integrity and availability. Individually, these procedures are not quite sufficient for the security of digital images. This research presents a novel approach of encrypting the images. It comprises of three key components. The original image has been encrypted using large secret key by rotating pixel bits to right through XOR operation. For steganography, encrypted image has been altered by least significant bits (LSBs) of the cover image and obtained stego image, then stego image has been watermarked in the time domain and frequency domain to ensure the ownership. The proposed approach is efficient, simpler and secured; it provides significant security against threats and attacks. The results have been evaluated in terms of PSNR and MSE and comparative analysis with other popular existing methods has been performed.
Pages: 11-18  |  495 Views  30 Downloads
How to cite this article:
Afseen Bano, Prateek Singh. Image encryption using block based transformation algorithm. Pharma Innovation 2019;8(3):11-18.
The Pharma Innovation Journal