By Borko Furht, Edin Muharemagic, Daniel Socek
Multimedia Encryption and Watermarking offers a entire survey of up to date multimedia encryption and watermarking suggestions, which allow a safe trade of multimedia highbrow property.
Part I, electronic Rights administration (DRM) for Multimedia, introduces DRM innovations and types for multimedia content material security, and offers the foremost gamers. half II, Multimedia Cryptography, offers an summary of recent cryptography, with the point of interest on smooth photo, video, speech, and audio encryption thoughts. This booklet additionally offers a sophisticated notion of visible and audio sharing innovations. half III, electronic Watermarking, introduces the concept that of watermarking for multimedia, classifies watermarking functions, and evaluates a number of multimedia watermarking strategies and methods, together with electronic watermarking recommendations for binary images.
Multimedia Encryption and Watermarking is designed for researchers and practitioners, in addition to scientists and engineers who layout and boost structures for the security of electronic multimedia content material. This quantity can be appropriate as a textbook for graduate classes on multimedia security.
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Extra resources for Multimedia Encryption and Watermarking (Multimedia Systems and Applications)
Thus, such a sequence would have to be physically transmitted to Bob, possibly using a trusted courier. This must be done for every communicant, and for every single message. In addition, the random sequence must be long enough to facilitate encryption of an entire message. All this makes implementing a onetime pad difficult in practice. It has been reported that a one-time pad was used for securing Washington's top-secret communication with Moscow during the cold war. During this time, a trusted courier was used to transmit the random sequence (the key).
If the number of bits in the message is not an exact multiple of n, the message is usually padded. The result of this is concatenation of nbit ciphertext blocks. The decryption function takes these ciphertext blocks and decrypts them one at a time. The parameter n is often denoted by blocksize, or blocklength. Block ciphers usually have blocklength of 64-bits or more. Most available cryptosystems, both symmetric and asymmetric, are block ciphers. Note that a block cipher can be thought of a s a simple substitution cipher, such as the Caesar cipher, in which the number of symbols is extremely large.
Here, participants refer to people, computers, or anything else capable of conducting communication. Without loss of generality, let u s assume a scenario in which there are two communicating participants. Essentially, a communication between the participants consists of exchanging messages over a channel. For example, the channel could be the air, or it could be some kind of computer An Overview of Modem Cryptography network. If two people are talking close to one another, air acts as a channel that transmits the sound waves.
Multimedia Encryption and Watermarking (Multimedia Systems and Applications) by Borko Furht, Edin Muharemagic, Daniel Socek