Shamir's Secret Sharing is an algorithm in cryptography. It is a form of secret sharing, where a secret is divided into parts, giving each participant its own unique part, where some of the parts or all of them are needed in order to reconstruct the secret.
Counting on all participants to combine together the secret might be impractical, and therefore sometimes the threshold scheme is used where any of the parts are sufficient to reconstruct the original secret.
Read more about Shamir's Secret Sharing: Mathematical Definition, Shamir's Secret-sharing Scheme, Properties, See Also
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