An Encryption-then-Compression System for Lossless Image Compression Standards

• Published in: IEICE Transactions on Information and Systems Vol. E100.D; no. 1; pp. 52 - 56
• Main Authors: KIYA, Hitoshi, KURIHARA, Kenta, SHIOTA, Sayaka, IMAIZUMI, Shoko
• Format: Journal Article
• Language: English
• Published: Tokyo The Institute of Electronics, Information and Communication Engineers 01.01.2017; Japan Science and Technology Agency
• Subjects: Encryption; Encryption-then-Compression system; Image compression; international standard; JPEG encoders-decoders; JPEG XR; JPEG-LS; lossless compression; Lossless equipment; Multimedia; Video compression
• ISSN: 0916-8532; 1745-1361
• DOI: 10.1587/transinf.2016MUL0002

In many multimedia applications, image encryption has to be conducted prior to image compression. This letter proposes an Encryption-then-Compression system using JPEG XR/JPEG-LS friendly perceptual encryption method, which enables to be conducted prior to the JPEG XR/JPEG-LS standard used as an international standard lossless compression method. The proposed encryption scheme can provides approximately the same compression performance as that of the lossless compression without any encryption. It is also shown that the proposed system consists of four block-based encryption steps, and provides a reasonably high level of security. Existing conventional encryption methods have not been designed for international lossless compression standards, but for the first time this letter focuses on applying the standards.