pseudorandom number generator

{
  "id": "MLC-T-CYB-003360",
  "term": "pseudorandom number generator",
  "field": "Cybersecurity",
  "definition": "1. 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.\n\n2. 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.\n\n3. A deterministic computational process that has one or more inputs called \"seeds\", and it outputs a sequence of values that appears to be random according to specified statistical tests. A cryptographic PRNG has the additional property that the output is unpredictable, given that the seed is not known.\n\n4. A deterministic algorithm which, given a truly random binary sequence of length k, outputs a binary sequence of length l >> k which appears to be random. The input to the generator is called the seed, while the output is called a pseudorandom bit sequence.\n\n5. See Deterministic random bit generator (DRBG).\n\n6. See Deterministic Random Bit Generator.\n\n7. 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.\n\n8. 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. 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.\n\n9. 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.",
  "abbreviation": "PRNG",
  "synonyms": [
    "Deterministic Random Bit Generator",
    "Deterministic random bit generator (DRBG)"
  ],
  "see_also": [
    "Deterministic Algorithm"
  ],
  "references": [
    "NIST SP 800-90A Rev. 1",
    "NIST SP 800-90B",
    "CNSSI 4009-2015 from IETF RFC 4949 Ver 2 (Adapted)",
    "NIST SP 800-22 Rev. 1a",
    "NIST SP 800-57 Part 1 Rev. 4 [Superseded]; NIST SP 800-57 Part 1 Rev. 5; NIST SP 800-57 Part 1 Rev. 3 [Superseded]",
    "NIST SP 800-57 Part 1 Rev. 4 [Superseded]",
    "NIST SP 800-57 Part 1 Rev. 5",
    "NIST SP 800-57 Part 1 Rev. 3 [Superseded]",
    "NIST CSRC Glossary"
  ],
  "url": "https://mlchart.com/terminology/cybersecurity/pseudorandom-number-generator/"
}