There's a nice demonstration of a zero-knowledge protocol here: http://aperiodical.com/2012/03/using-a-zero-knowledge-protocol-to-prove-you-can-solve-a-sudoku-3

There's a nice demonstration of a zero-knowledge protocol here: http://aperiodical.com/2012/03/using-a-zero-knowledge-protocol-to-prove-you-can-solve-a-sudoku-3/ http://aperiodical.com/2012/03/using-a-zero-knowledge-protoc...