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Showing 6 matching records.
Digital Signatures
As an electronic analogue of a written signature, a digital signature provides assurance that: the claimed signatory signed the information, and the information was not modified after signature generation. Federal Information Processing Standard (FIPS) 186-4, Digital Signature Standard (DSS), specifies three NIST-approved digital signature algorithms: DSA, RSA, and ECDSA. All three are used to generate and verify digital signatures, in conjunction with an approved hash function specified...
Elliptic Curve Cryptography ECC
Elliptic curve cryptography is critical to the adoption of strong cryptography as we migrate to higher security strengths. NIST has standardized elliptic curve cryptography for digital signature algorithms in FIPS 186 and for key establishment schemes in SP 800-56A.  In FIPS 186-4, NIST recommends fifteen elliptic curves of varying security levels for use in these elliptic curve cryptographic standards. However, more than fifteen years have passed since these curves were first developed, and...
Multi-Party Threshold Cryptography MPTC
The multi-party paradigm of threshold cryptography enables a secure distribution of trust in the operation of cryptographic primitives. This can apply, for example, to the operations of key generation, signing, encryption and decryption. This project focuses on threshold schemes for cryptographic primitives: using a “secret sharing” mechanism, the secret key is split across multiple "parties"; if some (up to a threshold f out of n) of these parties are corrupted, the key secrecy remains...
Pairing-Based Cryptography
Recently, what are known as “pairings” on elliptic curves have been a very active area of research in cryptography. A pairing is a function that maps a pair of points on an elliptic curve into a finite field. Their unique properties have enabled many new cryptographic protocols that had not previously been feasible. In particular, identity-based encryption (IBE) is a pairing-based scheme that has received considerable attention. IBE uses some form of a person (or entity’s) identification to...
Post-Quantum Cryptography: Digital Signature Schemes
Call for Additional Digital Signature Schemes for the Post-Quantum Cryptography Standardization Process (PDF) NIST announced that the PQC standardization process is continuing with a fourth round, with the following KEMs still under consideration: BIKE, Classic McEliece, HQC, and SIKE. However, there are no remaining digital signature candidates under consideration. As such, NIST is calling for additional digital signature proposals to be considered in the PQC standardization...
Stateful Hash-Based Signatures HBS
In Special Publication 800-208, Recommendation for Stateful Hash-Based Signature Schemes NIST approves two schemes for stateful hash-based signatures (HBS) as part of the post-quantum cryptography development effort.  The two schemes were developed through the Internet Engineering Task Force: 1) XMSS, specified in Request for Comments (RFC) 8391 in May 2018, and 2) LMS, in RFC 8554 in April 2019. Background HBS schemes were the topic for a session of talks during the first public workshop on...