GPS *had* no encryption or authentication; indeed, such security is only a recent addition to the L2 frequency.
USK: Galileo also has authentication available on its civilian frequencies.
USK: Galileo also has authentication available on its civilian frequencies.
This was a long time ago, but I distinctly remember the encrypted P(Y)-code and anti-spoofing being operative in the mid 1990s.
Is that already available? I thought GPS L2C didn't include authentication yet.