Abstract: A symmetric data encryption system configured to receive a data stream to be encoded; to relate segments of the data stream with a predetermined distortion-inducing amplitude of light to encrypt the data stream; to transmit the data stream; to decrypt the data stream by compensating for the value induced by the distortion-inducing amplitude of light; wherein the distortion-inducing amplitude of light relates to different wavelengths of light emitted by one or more of a plurality of light sources in a non-uniform manner so the effect of the distortion-inducing amplitude of light is difficult to predict, thereby providing obfuscation and encryption of the data stream.

Abstract: A symmetric data encryption system configured to receive a data stream to be encoded; to relate segments of the data stream with a predetermined distortion-inducing amplitude of light to encrypt the datastream; to transmit the datastream; to decrypt the data stream by compensating for the value induced by the distortion-inducing amplitude of light; wherein the distortion-inducing amplitude of light relates to different wavelengths of light emitted by one or more of a plurality of light sources in a non-uniform manner such that the effect of the distortion-inducing amplitude of light is difficult to predict, thereby providing obfuscation and encryption of the datastream.

Abstract: A computing apparatus has a logic unit configured to perform an arithmetic operation by relating light beams, each having a respective light amplitude, to obtain a light-based result of the operation, and to evaluate the light-based result to output a corresponding numeric result. The logic unit uses variables values, each corresponding to a respective distinct light amplitude, the variable values thereby corresponding to a plurality of distinct light amplitudes.