By Tommy M. McGuire, Mohamed G. Gouda

ISBN-10: 0387232273

ISBN-13: 9780387232270

ISBN-10: 0387233989

ISBN-13: 9780387233987

ISBN-10: 0387234039

ISBN-13: 9780387234038

ISBN-10: 1402070241

ISBN-13: 9781402070242

"Image and Video Encryption: From electronic Rights administration to Secured own verbal exchange presents a unified evaluation of ideas 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 diverse suggestions from a unified perspective, then evaluates those suggestions with admire to their respective homes. it truly is designed for a qualified viewers composed of researchers and practitioners in undefined. The ebook is additionally compatible for graduate-level scholars in laptop technology and electric engineering.

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Additional info for Image and Video Encryption From Digital Rights Management to Secured Personal Communication

Example text

Modern cryptography relies on the Kerckhoff Principle [70]: One must assume that all details about the cipher are known to the enemy, the exact algorithm and all its inner workings, except one small piece of data called key. The output of the cipher should depend solely on the key (and of course on the input data). Modern ciphers should withstand all attacks to deduct the key from some other data, even in such extreme cases when the attacker can choose the input data for the “black box” cipher+key and subsequently read the output data.

Note that spline approximation to measurement data is used for encryption and transmission timings as well. Twenty different functions time(data) are obtained by combining two compression techniques, two encryption modes, and five transmission media. Finally we obtain functions which output the time demand of the entire processing chain upon input of the desired target quality by inserting into time(data): The spline approximations and the resulting twenty functions are all generated using MATLAB.

The decryption works in reverse order: the current ciphertext block is decrypted, the result XOR-ed with the previous ciphertext block, the result is the original plaintext block. A careful reader might have noticed that there is a problem at the beginning, to solve this a dummy block must be transmitted first to start the chain, this block is also called “initialisation vector” (IV). Transmission errors have a slightly larger impact, a flipped bit leads to completely different plaintext version of the current block (as in ECB), and it changes a single bit of plaintext in the next block.

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Image and Video Encryption From Digital Rights Management to Secured Personal Communication by Tommy M. McGuire, Mohamed G. Gouda

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