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In this work we present hbAVSS, the Honey Badger of Asynchronous VerifiableSecret Sharing (AVSS) protocols - an AVSS protocol that guarantees linearamortized communication overhead even in the worst case. The best prior workcan achieve linear overhead only at a suboptimal resilience level (t < n/4) orby relying on optimism (falling back to quadratic overhead in case of networkasynchrony or Byzantine faults). Our protocol therefore closes this gap,showing that linear communication overhead is possible without thesecompromises. The main idea behind our protocol is what we call theencrypt-and-disperse paradigm: by first applying ordinary public key encryptionto the secret shares, we can make use of highly efficient (but notconfidentiality preserving) information dispersal primitives. We prove ourprotocol is secure under a static computationally bounded Byzantine adversarymodel.

Brief Note: Asynchronous Verifiable Secret Sharing with Optimal Resilience and Linear Amortized Overhead