1. In a data processing system, an integrated circuit having a security system, said integrated circuit comprising: circuitry within said integrated circuit for manipulating integrated circuit data; circuitry within said integrated circuit for storing the integrated circuit data, the circuitry for storing the integrated circuit data being coupled to the circuitry for manipulating the integrated circuit data; means for providing the integrated circuit data to a location external to the integrated circuit, the means for providing the integrated circuit data being coupled to the circuitry for manipulating the integrated circuit data; means for receiving data from external to the integrated circuit, said means being coupled to the circuitry within said integrated circuit for storing integrated circuit data; means for interpreting data from external to the integrated circuit, said means being coupled to the means for receiving external data wherein external data may be input from an external source through the means for receiving external data, the external data being interpreted into interpreted data or instructions by the means for interpreting external data, the interpreted data or instructions being used by the circuitry within said integrated circuit for manipulating integrated circuit data to perform data processing operations within the integrated circuit; and circuitry functioning as the security system, the security system being coupled to the means for providing the integrated circuit data, the security system providing one of three security levels to the means for providing the integrated circuit data, a first security level being a normal operation mode wherein the integrated circuit data may be accessed from external to the integrated circuit through the means for providing the integrated circuit data without security restrictions, a second security level being a revocable security mode wherein access to the integrated circuit data from external to the integrated circuit is limited, the revocable security mode being capable of being changed to another security level, a third security level being an irrevocable security mode wherein access to the integrated circuit data from external to the integrated circuit is limited, the irrevocable security mode cannot be nondestructively changed to another security level.