1. A system, comprising: an electronic device, comprising: memory circuit configured to store an application comprising a plurality of instructions; and processing circuitry configured to execute the application and an application authenticity check routine, wherein: the application authenticity check routine includes instructions executable by the processing circuitry to use idle processing time to verify an authenticity of the application throughout execution of the application, the application comprises at least one encoded set of instructions, and the authenticity of the application is verified using a bitwise analysis of the at least one encoded set of instructions, and executing the authenticity check routine causes the processing circuitry to consume a constant amount of power, or executing the application causes the processing circuitry to emit a constant amount of electromagnetic radiation.