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- W3021458422 abstract "A key is used to create a pseudorandom bit stream by computing successive values of some encryption or hash function. This bit stream is used to either choose a subset of the file or to control how it is encoded at each location. Only someone with the same key can recover the information. It also makes sense to encrypt the file with another key and a cryptographically strong algorithm before it is inserted. Most of the keying techniques used in steganography are extensions of the solutions used in basic cryptography. Some of the basic types are discussed in this chapter. Keying the algorithm defends against the often public nature of computer standards. If the software is going to be used often and distributed to many people, then the algorithms inside of it become public. Adding a key to the algorithm increases its strength dramatically. Many of the algorithms add an extra layer of disguise by using the key to modify the behavior of the algorithm. This means that any attacker will not be able to extract the data with knowledge of the algorithm alone. Pseudorandom bit streams created by repeated encryption or hashing can be quite secure. One should replace any random number generator used to add noise with a pseudorandom keyed stream, which can also be used to extract particular subsets or to rearrange the data itself." @default.
- W3021458422 created "2020-05-13" @default.
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- W3021458422 date "2009-01-01" @default.
- W3021458422 modified "2023-09-25" @default.
- W3021458422 title "Keys" @default.
- W3021458422 doi "https://doi.org/10.1016/b978-012374479-1.50017-4" @default.
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