A method and apparatus for improving the reliability of a digital communications system is provided. In accordance with at least one embodiment, power of a transmitted signal is controlled to improve reliability. In accordance with at least one embodiment, timing of a transmitted signal is controlled to improve reliability. In accordance with at least one embodiment, interference is detected. In accordance with at least one embodiment, interference is localized. In accordance with at least one embodiment, combinatorial processing is used to increase reliability. In accordance with at least one embodiment, gradual rekeying is performed. In accordance with at least one embodiment, confirmed stepwise progression rekeying is performed. In accordance with at least one embodiment, transmission detection is provided. In accordance with at least one embodiment, reporting of cryptographic mode utilization is provided.