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The upcoming NIST First Call for Multi-Party Threshold Schemes (see the initial public draft in NIST IR8214C ipd) will solicit public proposals of threshold schemes (multi-party protocols) for various cryptographic primitives. This process involves techniques of MPC (secure multiparty computation), ZKP (zero-knowledge proofs), FHE (fully-homomorphic encryption), and IBE/ABE (identity-based and attribute-based encryption), among other techniques of interest to the PEC project. More details about the public call can be found in the webpage of the NIST Multi-Party Threshold Cryptography (MPTC) project.
Below is a copy of Table 2 of the mentioned draft call (NIST IR8214C ipd), showcasing the subcategories of interest, within category Cat2 (for primitives not specified by NIST). The analysis of submitted schemes will include engagement by the MPTC and the PEC projects.
|Subcategory: Type||Example scheme||Example primitive|
|C2.1: Signing||Succinct & verifiable-deterministic signatures||Signing|
|C2.2: PKE||TF-QR public-key encryption (PKE)||Decryption/encryption|
|C2.3: KA||Low-round multi-party key-agreement (KA)||Single-party primitives|
|C2.4: Symmetric||TF-QR blockcipher/PRP; TF-QR KC/KD||Encipher/decipher; PRF and hash function|
|C2.5: Keygen||Any of the above||Keygen|
|C2.6: Advanced||QR FHE; IBE; ABE||Decryption; Keygens|
|C2.7: ZKPoK||ZKPoK of private key||ZKPoK.Generate|
|C2.8: Gadgets||Garbled circuit (GC)||GC.generate; GC.evaluate|
Legend: 2KE = pair-wise key-establishment; KC = Key confirmation; KD = Key derivation; Keygen = key-generation; PRF = pseudorandom function (family); PRP = pseudorandom permutation (family); QR = quantum resistant; TF = threshold friendly; ZKPoK = Zero-knowledge proof of knowledge.
Security and Privacy: cryptography, privacy