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# Paket: libghc-tf-random-doc (0.5-9)

## high-quality splittable pseudorandom number generator; documentation

This package contains an implementation of a high-quality splittable pseudorandom number generator. The generator is based on a cryptographic hash function built on top of the ThreeFish block cipher. See the paper Splittable Pseudorandom Number Generators Using Cryptographic Hashing by Claessen, Pałka for details and the rationale of the design.

The package provides the following:

 * A splittable PRNG that implements the standard System.Random.RandomGen class.


 * The generator also implements an alternative version of the
System.Random.TF.Gen.RandomGen class (exported from System.Random.TF.Gen),
which requires the generator to return pseudorandom integers from the full
32-bit range, and contains an n-way split function.


 * An alternative version of the Random class is provided, which is linked to
the new RandomGen class, together with Random instances for some integral
types.


 * Two functions for initialising the generator with a non-deterministic
seed: one using the system time, and one using the /dev/urandom UNIX
special file.


Please note that even though the generator provides very high-quality pseudorandom numbers, it has not been designed with cryptographic applications in mind.

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