Is GMW different from Secret Sharing? Is GMW (How to play ANY mental game) protocol different from Secret Sharing??
If so, how is it different from Secret sharing?
They are very different. GMW is a multi-party computation protocol while secret sharing is a technique to distribute a secret. GMW uses secret sharing as a building block but it also uses other primitives like an oblivious transfer (OT). GMW deals with the problem that multiple parties jointly compute a function (over their inputs) securely without revealing anything else except the final output value of the function. Note that a simple difference is that GMW does not have a particular secret distributor (well actually every party distributes secrets), as opposed to secret sharing.