A Key Derivation Scheme for Hierarchical Access Control to JPEG 2000 Coded Images

Abstract

This paper proposes a key derivation scheme to control access of JPEG 2000 (JP2) coded images, which consist of hierarchical scalability such as SNR, resolution levels, and so on. The proposed scheme simultaneously controls access to each level of scalability. The proposed scheme derives keys through hash chains, and each JP2 packet is enciphered with each individual key. By introducing combinations of a cyclic shift and a hash function, the proposed scheme manages only a single key for a JP2 image; whereas the conventional access control schemes having the above mentioned features manage multiple keys. The single managed key is not delivered to any user. The proposed scheme is also resilient to collusion attacks. Performance analysis shows the effectiveness of the proposed scheme.

Hierarchical key management for multi-resolution load data representation

“…The aim is the same as with Imaizumi et al [17]. A user should be able to watch his/her subscribed layer data with just holding one key.…”

“…As the use case of multi-resolution representation of load data is quite similar to H.264/SVC and JPEG2000 encryption, techniques proposed in [17]- [19] can be adopted. A hierarchical resolution key is generated for each level of resolution.…”

“…Imaizumi et al propose a scheme for hierarchical access control to JPEG2000 coded images in [17]. Image properties are encrypted with different keys.…”

“…Hash chains or hash trees are also used for access control to JPEG2000 coded images or H.264/scalable coded video (H.264/SVC) [17]- [19].…”