Description

tontine-java is an API and application implementing Shamir's Secret Sharing scheme. This scheme allows for information (the secret) to be split into multiple pieces (keys), such that some number of these pieces can be brought together to form the original information. Typically, these keys are distributed to users after creation. Each key in this implementation is slightly over twice as large as the original secret. The slight increase over 2x size is due to an entropy-preserving technique. The keys should pass the same tests for randomness that the generator used (java.security.SecureRandom) does.

The API is com.buttsoft.crypto.SecretShare

The test application is com.buttsoft.apps.tontine.Tontine.

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Potential Uses

tontine-java may be useful in applications for sharing "emergency" passwords among employees or in distributed file sharing applications.