1. A method comprising: accessing, by one or more computing devices, one or more binary decision diagrams (BDDs) representing measurement data taken by one or more sensors; accessing, by one or more of the computing devices, a first hash code corresponding to the BDDs, wherein the BDDs and the first hash code are transmitted from one or more of the sensors to one or more of the computing devices; transforming, by one or more of the computing devices, the BDDs to an arithmetic function according to one or more identity rules; calculating, by one or more of the computing devices, a second hash code from the arithmetic function; if the first hash code equals the second hash code, designating, by one or more of the computing devices, the measurement data as valid; and otherwise, designating, by one or more of the computing devices, the measurement data as invalid.