Multimedia Security 2

5Crypto-Compression of Videos

Cyril BERGERON¹, Wassim HAMIDOUCHE² and Olivier DÉFORGES²

¹Thales SIX GTS France, Gennevilliers, France

²IETR, INSA Rennes, Univ Rennes, France

Recent developments in digital communication systems and the widespread use of video content have raised new concerns about media security and privacy. This chapter addresses these emerging security issues by providing a state of the art of partial, perceptual and selective encryption approaches. We also present recent work in the field of video crypto-compression, with a particular focus on selective encryption adapted to video compression standards. In this context, methods are proposed for evaluating the visual privacy offered by these solutions.

5.1. Introduction

5.1.1. Background

The quest for confidentiality in communications has long been a subject of interest for scholars, dating back to ancient times (with examples including Caesar’s code, Al-Kindi’s cryptanalysis, Vigenère’s cipher, etc.). Over the centuries, what began as a form of art evolved into a fully fledged science in its own right under the name of cryptology (including cryptography and cryptanalysis). The notion of secrecy in communications was initially brought into focus by the need to protect crucial data in the military and diplomatic fields (Kerckhoffs 1883); it was later adopted in the civilian world in order to preserve the confidentiality of information and messages, notably in an industrial context, for the protection of commercial ...