asyncmpc

2026-09-04
Two signals today: one from cryptography research, and one from U.S. securities regulation. Blockchain can provide persistence and finality, but it does not automatically change the classical fault-tolerance threshold for asynchronous MPC. Meanwhile, the SEC has proposed updating the rules for registered transfer agents, bringing electronic records, blockchain records, and risk management under the same modernized framework. [1][2]
According to IACR ePrint 2026/1860, researchers separately analyze asynchronous verifiable secret sharing and asynchronous multi-party computation in blockchain hybrid models. The paper points out that in the absence of a trusted setup, or when relying only on the Minicrypt assumption, asynchronous MPC is still subject to the classical fault-tolerance boundary constraints. Under a public-key assumption with a trusted setup, the authors construct a scheme that tolerates Byzantine adversaries and make the on-chain communication complexity independent of the circuit size. [1]