Title :
An encryption-then-compression system for JPEG standard
Author :
Kurihara, Kenta ; Shiota, Sayaka ; Kiya, Hitoshi
Author_Institution :
Tokyo Metropolitan Univ., Hino, Japan
fDate :
May 31 2015-June 3 2015
Abstract :
In many multimedia applications, image encryption has to be conducted prior to image compression. This paper proposes an Encryption-then-Compression system using a JPEG-friendly perceptual encryption method, which enables to be conducted prior to JPEG compression. The proposed encryption method can provides approximately the same compression performance as that of JPEG compression without any encryption, where both gray scale images and color ones are considered. It is also shown that the proposed system consists of four block-based encryption steps, and provide a reasonably high level of security. Most of conventional perceptual encryption methods have not been designed for international compression standards, but this paper focuses on applying the JPEG standard, as one of the most widely used image compression standards.
Keywords :
cryptography; data compression; image coding; image colour analysis; JPEG standard; JPEG-friendly perceptual encryption method; block-based encryption; color images; encryption-then-compression system; gray scale images; image compression; multimedia applications; Cryptography; Image coding; Standards;
Conference_Titel :
Picture Coding Symposium (PCS), 2015
Conference_Location :
Cairns, QLD
DOI :
10.1109/PCS.2015.7170059