Numbers simulating randomness through algorithms.

In cryptography, pseudorandom noise is a signal similar to noise which satisfies one or more of the standard tests for statistical randomness.

In theoretical computer science and cryptography, a pseudorandom generator for a class of statistical tests is a deterministic procedure that maps a random seed to a longer pseudorandom string such that no statistical test in the class can distinguish between the output of the generator and the uniform distribution.

A device or algorithm that deterministically produces a succession of values that appear in an unpredictable sequence or apparently random order.

A cryptographically secure pseudorandom number generator or cryptographic pseudorandom number generator is a pseudorandom number generator with properties that make it suitable for use in cryptography.

A pseudorandom binary sequence, pseudorandom binary code or pseudorandom bitstream is a binary sequence that, while generated with a deterministic algorithm, is difficult to predict and exhibits statistical behavior similar to a truly random sequence.