Implementation of a verifiable weighted threshold secret sharing scheme

This implementation is based on the following papers:

• "Constructing Ideal Secret Sharing Schemes based on Chinese Remainder Theorem" for the weighted threshold secret sharing scheme;
• "Zexe: Enabling Decentralized Private Computation" for making the scheme verifiable through a polynomial commitment scheme;
• "A tool for implementing privacy in Nano" for the decryption without reconstructing the secret (TODO).

WARNING: This is an academic proof-of-concept prototype, and in particular has not received careful code review. This implementation is NOT ready for production use.