In medical information systems, image data can be considered crucial information. As imaging technology and methods for analyzing images advance, there will a greater wealth of available study. Hence, protecting those is essential. Image encryption are in multimedia applications ensuring the security authenticity digital images. Recently, has garnered significant attention from academics due to...

In this paper, the quaternion discrete Cosine transform (QDCT) is applied to the color image encryption technology, and partial encryption technique of color image based on QDCT is proposed. Obtained the QDCT spectrum of color image by QDCT, the real and imaginary parts of QDCT coefficients are quantized and encoded with the color image quantization coefficient table and QDCT coefficients encod...

This project proposes method for image encryption and decryption, data embedding and data extraction. The content owner first encrypts image by BB equation and chaos algorithm, then the data is encrypted using data hiding key and embedded into LSB bit of specific pixels. With an encrypted image containing additional data, if a receiver has the data-hiding key, the data can be extracted without ...

Abstract Optical technologies have been widely used in information security owing to its parallel and high-speed processing capability. However, the most critical problem with current optical encryption techniques is that cyphertext linearly related plaintext, leading possibility one can crack system by solving a set of linear equations only two from same machine. Many efforts taken last decade...

In this age of the multi-media, images have an important impact on communication. When users upload over insecure communication network, total security is a difficult problem to address in order maintain image confidentiality. Also, encryption technique for keeping secret. This study gives basic introduction cryptography, as well concise overview regarding many algorithms' elemental criteria. p...