pvss 0.1.0

Publicly verifiable secret sharing implementations

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This package provide secret sharing schemes which are publicly veriable and recoverable
using a simple `t` out of `n` `(t,n)` threshold system.

A secret value can be **escrow** to N encrypted shares.

This secret value can be recovered by decrypting at least `t` amount of shares,
and combining them.

Publicly Verifiable Secret Sharing (PVSS) scheme implemented:

* [Schoenmaker]http://www.win.tue.nl/~berry/papers/crypto99.pdf
* [SCRAPE]https://eprint.iacr.org/2017/216.pdf


For now the implementation uses the P256R1 elliptic curve by default, through
the rust-openssl package.  In the future, the plan is to add support for all
curves that support the necessary operations.