1. A method for processing an operating sequence of instructions of a program in a processor, wherein each instruction is represented by an assigned instruction code which comprises one execution step to be processed by the processor or a plurality of execution steps to be processed successively by the processor, comprising: determining an actual signature value assigned to a current execution step of the execution steps of the instruction code representing the instruction of the operating sequence; determining, in a manner dependent on an address value, a desired signature value assigned to the current execution step; and if the actual signature value does not correspond to the desired signature value, omitting at least one execution step directly available for execution and an execution step indirectly available for execution.