Prior to 2000, the civilian signal (C/A code) was deliberately degraded by the addition of small random variations in the time signal, but this is no longer the

Prior to 2000, the civilian signal (C/A code) was deliberately degraded by the addition of small random variations in the time signal, but this is no longer the case. A separate military signal (P-code) still exists, which is encrypted in order to prevent spoofing; to my knowledge, the encryption scheme used for the military signal is still classified.