Implement Share Encryption

[ryardley]

Currently in the TrBFV branch shares are unencrypted

We need to encrypt Shamir Shares with PVW so parties can receive the correct shares securely

[ryardley]

After a meeting with @0xjei we are not sure it makes sense to push forward with this without some kind of optimization on account of encryption taking an extraordinary amount of time.

[0xjei]

After a meeting with @0xjei we are not sure it makes sense to push forward with this without some kind of optimization on account of encryption taking an extraordinary amount of time.

I am going to wrap some numbers in the relevant cryptography document by the end of today

[0xjei]

moving this to pickup given the new BFV approach!

[hmzakhalid]

Removing Blocked tag since its in pickup. I assume its not blocked now?

[0xjei]

once I merge #942 should be good to go!