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

Kenta KURIHARA  Shoko IMAIZUMI  Sayaka SHIOTA  Hitoshi KIYA  

IEICE TRANSACTIONS on Information and Systems   Vol.E100-D   No.1   pp.52-56
Publication Date: 2017/01/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2016MUL0002
Type of Manuscript: Special Section LETTER (Special Section on Enriched Multimedia —New Technology Trends in Creation, Utilization and Protection of Multimedia Information—)
Encryption-then-Compression system,  lossless compression,  international standard,  JPEG XR,  JPEG-LS,  

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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.