Abstract
Video stream encryption is the main method for the protection of intellectual property in modern digital rights management systems (DRM). Existing encryption methods ensure very high protection level of encrypted content, but at the same time are very resources demanding, making them hardly suitable for low processing power mobile end-user devices. This paper presents partial MPEG-2 transport stream encryption method, which is suitable for such low power user terminals. The experimental evaluation of proposed method show that encryption and decryption times, comparing with standard full encryption, are reduced from 3 (static video) up to 9 times (dynamic video), making proposed method a good choice for low processing power decryption devices. Ill. 6, bibl. 14, tabl. 4 (in English; abstracts in English and Lithuanian). DOI: http://dx.doi.org/10.5755/j01.eee.118.2.1180
Highlights
An intellectual property rights protection became a very common problem in recent years
In this paper we propose a novel partial encryption method, which performs encryption not at the encoding level, but at the transport level (MPEG-2 transport stream)
At the same time the number of encrypted packets and corresponding encryption and decryption times are reduced dramatically comparing with full encryption
Summary
An intellectual property rights protection became a very common problem in recent years. It is important for the digital video content such as IPTV providers, because their business continuity is directly affected if anybody can use that content illegally. Smarthome and smart-environment content provisioning systems, like SNAPAS [1] must protect their digital content and ensure, that end-users with their low power terminal devices will be able to watch video stream in realtime. MPEG-4 H.264/AVC video streaming format became very popular recently It has many advantages comparing with older MPEG H.261 encoding format, because it requires less internet bandwidth, has better decoded video quality, many IPTV STB devices and TV have hardware decoding accelerators
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