Image and Video Encryption offers a unified evaluation of recommendations for encryption of pictures and video facts. This levels from advertisement functions like DVD or DVB to extra examine orientated subject matters and lately released fabric. This quantity introduces diversified recommendations from unified perspective, then evaluates those suggestions with appreciate to their respective homes (e.g., protection, speed.....).
Encryption of visible facts is a vital subject within the quarter of mutimedia safeguard, functions diversity from electronic rights administration (DVD, DVB) ) to safe own communications. inside of this subject region, we are facing a number of goals which contradict one another. What we thrive on is sweet compression, speedy compression, excessive safety, quick encryption, bitstream compliance, little energy intake and little reminiscence standards.
The authors experimentally evaluate diversified techniques proposed within the literature and comprise an in depth bibliography of corresponding released material.
Image and Video Encryption is designed for a qualified viewers composed of researchers and practitioners in undefined. The ebook is usually compatible for graduate-level scholars in computing device technological know-how and electric engineering.
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E. the user or a specific application does not have to take care about confidentiality. The obvious disadvantage is that confidentiality is provided for all applications, no matter if required or not, and that it is not possible to exploit specific properties of certain applications. To give a concrete example, consider the distributed medical database infrastructure mentioned in the introduction. If the connections among the components are based on TCP/IP internet-connections (which are not confidential by itself of course), confidentiality can be provided by creating a Virtual Private Network (VPN) using IPSec (which extends the IP protocol by adding confidentiality and integrity features).
For this assessment, we evaluate the following properties: Time demand: The additional time demand required for the encryption consists of two parts – the time required to perform the actual encryption (denoted as “time(E)”) and the time required to identify the parts of the data which are subject to encryption (which may include bitstream parsing or any other preprocessing technique and is denoted as “time(P)”). The time demand is rated as 0, low, medium, high, and may have the additional property of being scalable if depending on the amount of data encrypted.
Lossless JPEG as described before employs a DPCM codec. GIF and PNG both use dictionary coding as the underlying technique – LZW coding in the case of GIF and LZSS coding in the case of PNG. JBIG uses context-based binary arithmetic coding for compressing bitplanes. For some details on these lossless compression techniques see . Chapter 3 CRYPTOGRAPHY PRIMER 1. Introduction, Terminology Cryptography, cryptanalysis (sometimes also written cryptoanalysis), cryptology: What is this all about? Do these words mean the same?