A method of establishing security in an electronic device. The method includes generating a statistically unique root key value and storing the root key value in a one-time programmable memory of the device. The method also includes isolating firmware in the device from access to the root key value. The root key value is used as a root of trust that ensures that each electronic device has its own key. In general, the root key is used to encrypt other keys in the device. In different aspects, a root key test value, which is utilized to test the root key, and other security features such as a re-purpose number and a cipher block chaining re-purpose value are included to protect the electronic device from unauthorized access. An electronic device that includes these security features is also provided.