A method and an information handling system comprising a processor executing instructions of a basic input/output system (BIOS) module operatively connected to a network interface device standard absorption rate (SAR) antenna power control register via a bus interface and the processor executing code instructions for a power management command for altering a power level of a transmission by an operably connected transmitting antenna according to SAR requirements in response to detection at a sensor indicating a change to transmission power levels is required, where the bus interface is secured by implementing a challenge/response cryptographic system between the BIOS module and the network interface device before allowing the read/write command to access the standard absorption rate control register.