A mimic function changes a file
so it assumes the statistical properties of another file
is the probability of some substring
, then a mimic function
It is commonly considered to be one of the basic techniques for hiding information, often called steganography.
The simplest mimic functions use simple statistical models to pick the symbols in the output.
If the statistical model says that item
occurs with probability
occurs with probability
, then a random number is used to choose between outputting
Even more sophisticated models use reversible Turing machines.
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