A Hierarchical Selective Encryption Technique in a Scalable Image Codec

Cyril Fonteneau (1) , Jean Motsch (1) , Marie Babel (2) , Olivier Déforges (2)

1 IETR - Institut d'Electronique et de Télécommunications de Rennes
2 IETR - Institut d'Électronique et des Technologies du numéRique

Modern still image codecs furnish more than just good distortion-rate performances. They must also provide some services. Scalability in resolution and quality, er- ror resilience and embedded bitstreams were among the first one to be available. There is still room for enhance- ment, especially when it comes to security-oriented fea- tures. Image encryption is one of the aspect of image security. This paper presents the embedding of an encryptionservice in a multiresolution lossless codec. Partial encryption is performed using ciphering only the keystone part of the codec algorithm, a quadtree decomposition. This results in a hierarchical encryption scheme, showing to be a good tradeoff between encryption speed, selective access and robustness.

Domains: Signal and Image processing; Signal and Image Processing

Cyril Fonteneau, Jean Motsch, Marie Babel, Olivier Déforges. A Hierarchical Selective Encryption Technique in a Scalable Image Codec. International Conference in Communications, Jun 2008, Bucharest, Romania. pp.1-4. ⟨hal-00336403⟩