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Deterministic Random Bit Generator (DRBG)

Abbreviation(s) and Synonym(s):

Deterministic random bit generator (DRBG)
deterministic random number generator
DRBG
Pseudorandom Number (or Bit) Generator
Pseudorandom Number Generator
Pseudorandom number generator (PRNG)
Pseudo-random Number Generator (PRNG)

Definition(s):

  An RBG that includes a DRBG mechanism and (at least initially) has access to a randomness source. The DRBG produces a sequence of bits from a secret initial value called a seed, along with other possible inputs. A DRBG is often called a Pseudorandom Number (or Bit) Generator. Contrast with NRBG.
Source(s):
NIST SP 800-90A Rev. 1

  An RBG that includes a DRBG mechanism and (at least initially) has access to a source of entropy input. The DRBG produces a sequence of bits from a secret initial value called a seed, along with other possible inputs. A DRBG is often called a Pseudorandom Number (or Bit) Generator.
Source(s):
NIST SP 800-90B under Deterministic Random Bit Generator (DRBG)

  A random bit generator that includes a DRBG algorithm and (at least initially) has access to a source of randomness. The DRBG produces a sequence of bits from a secret initial value called a seed, along with other possible inputs. A cryptographic DRBG has the additional property that the output is unpredictable, given that the seed is not known. A DRBG is sometimes also called a Pseudo-random Number Generator (PRNG) or a deterministic random number generator.
Source(s):
NIST SP 800-57 Part 1 Rev. 4 under Deterministic random bit generator (DRBG)

  See Deterministic Random Bit Generator.
Source(s):
NIST SP 800-90A Rev. 1 under Pseudorandom Number Generator

  See Deterministic random bit generator (DRBG).
Source(s):
NIST SP 800-57 Part 1 Rev. 3 under Pseudorandom number generator (PRNG) [Superseded]
NIST SP 800-57 Part 1 Rev. 4 under Pseudorandom number generator (PRNG)

  An algorithm that produces a sequence of bits that are uniquely determined from an initial value called a seed. The output of the DRBG “appears” to be random, i.e., the output is statistically indistinguishable from random values. A cryptographic DRBG has the additional property that the output is unpredictable, given that the seed is not known. A DRBG is sometimes also called a Pseudo Random Number Generator (PRNG) or a deterministic random number generator.
Source(s):
NIST SP 800-57 Part 1 Rev. 3 under Deterministic random bit generator (DRBG) [Superseded]