Towards optimal robust secret sharing with security against a rushing adversary

Robust secret sharing enables the reconstruction of a secret-shared message in the presence of up to t (out of n) incorrect shares. The most challenging case is when \(n = 2t+1\), which is the largest t for which the task is still possible, up to a small error probability \(2^{-\kappa }\) and with some overhead in the share size.

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