A system and method employing two-dimensional, cryptographic, poly-chromatic, poly-digital codes (“polycodes”) that may be employed in connection with various digital transactions and communications applications are disclosed. In some implementations, a polycode may generally comprise a plurality of discrete code cells arranged in a two-dimensional matrix, each of the plurality of code cells displaying a combination of zero or more pure chromatic inputs representing an encoded integer; the number of possible combinations of pure chromatic inputs is equal to the number of possible integer values such that a discrete combination of pure chromatic inputs is unique to a discrete integer that is used in the polycode.