dev-haskell/tf-random/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>haskell@gentoo.org</email>
		<name>Gentoo Haskell</name>
	</maintainer>
	<longdescription>
		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, PaBka 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.
		
		The package uses an adapted version of the reference C implementation of ThreeFish from the reference package of the Skein hash function (&lt;https://www.schneier.com/skein.html&gt;), originally written by Doug Whiting.
		
		Please note that even though the generator provides very high-quality pseudorandom numbers, it has not been designed with cryptographic applications in mind.
	</longdescription>
</pkgmetadata>