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The Digital Signature Standard (DSS) is a Federal Information Processing Standard specifying a suite of algorithms that can be used to generate digital signatures established by the U.S. National Institute of Standards and Technology (NIST) in 1994.
Five revisions to the initial specification have been released: FIPS 186–1 in 1998, [4] FIPS 186–2 in 2000, [5] FIPS 186–3 in 2009, [6] FIPS 186–4 in 2013, [3] and FIPS 186–5 in 2023. [7] Standard FIPS 186-5 forbids signing with DSA, while allowing verification of signatures generated prior to the implementation date of the standard ...
As of October 2012, CNSSP-15 [4] stated that the 256-bit elliptic curve (specified in FIPS 186-2), SHA-256, and AES with 128-bit keys are sufficient for protecting classified information up to the Secret level, while the 384-bit elliptic curve (specified in FIPS 186-2), SHA-384, and AES with 256-bit keys are necessary for the protection of Top ...
In 1999, NIST recommended fifteen elliptic curves. Specifically, FIPS 186-4 [4] has ten recommended finite fields: Five prime fields for certain primes p of sizes 192, 224, 256, 384, and 521 bits. For each of the prime fields, one elliptic curve is recommended.
In 2002, the National Institute of Standards and Technology (NIST) withdrew several geographic FIPS code standards, including those for countries (FIPS 10-4), U.S. states (FIPS 5-2), and counties . [7] [8] These are to be replaced by ISO 3166 and INCITS standards 38 and 31, respectively. [9]
NIST SP 800-56A: Use Curve P-384 for all classification levels. Elliptic Curve Digital Signature Algorithm (ECDSA) Asymmetric algorithm for digital signatures FIPS PUB 186-4: Use Curve P-384 for all classification levels. Secure Hash Algorithm (SHA) Algorithm for computing a condensed representation of information FIPS PUB 180-4
Note that there are two standardization efforts for EdDSA, one from IETF, an informational RFC 8032 and one from NIST as part of FIPS 186-5. [15] The differences between the standards have been analyzed, [ 16 ] [ 17 ] and test vectors are available.
In 2017, NIST announced that Curve25519 and Curve448 would be added to Special Publication 800-186, which specifies approved elliptic curves for use by the US Federal Government. [22] Both are described in RFC 7748. [23] A 2019 draft of "FIPS 186-5" notes the intention to allow usage of Ed25519 [24] for digital signatures. The 2023 update of ...
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