Random Numbers

• The IRandom Interface: The standard PRNG interface.
• The PRNGFactory Class: How to create an IRandom instance.
• ARCFour: Extra properties in the ARCFOUR PRNG.
• MDGenerator: Extra properties in the hash-based PRNG.
• ICMGenerator: Extra properties in the ICM PRNG.
• UMacGenerator: Extra properties in the UMac PRNG.
• PRNG Example: Programming example.

The pseudo-random number generator (PRNG) classes of GNU Crypto are used to generate streams of cryptographically secure pseudo-random bytes.

• ARCFOUR is an implementation of the ARCFOUR stream cipher's keystream generator. ARCFOUR is the name of a stream cipher that is believed to be compatible with RSA Data Security, Inc.'s RC4 stream cipher, and is a decendent of an algorithm that was posted anonymously to a mailing list in 1994.
• ICM, or the Integer Counter Mode PRNG, is an algorithm that creates a PRNG around a block cipher. The default cipher used in this implementation is Rijndael, the AES. ICM is described in [McG01].
• MD, or PRNGs based around a cryptographic hash function.
• UMAC-KDF is a PRNG based on the UMAC key derivation function.