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> Eu will know where were you when you requested something You don't request a positioning signal, they are broadcast by the satellites and nothing is sent bac
by gnode 7y ago
> Eu will know where were you when you requested something
You don't request a positioning signal, they are broadcast by the satellites and nothing is sent back by the receivers. Some devices (like smartphones) may send their GPS discovered position over the Internet, where encryption may be used, but this is not what is being referred to.
Encryption allows you to restrict access, or provided tiered access to signals of varying accuracy. You can also use cryptography in order to prevent spoofing.
- zimpenfish 7y ago> You can also use cryptography in order to prevent spoofing. I think that's probably the biggest selling point given how many important infrastructures rely heavily on GPS these days.
- gnode 7y agoI agree, although I'm not sure whether it's ever been implemented for public use. You get anti-spoofing naturally if you're just using secret symmetric encryption (if your adversary doesn't know the key, they can't generate a valid signal to trick you with). To prevent spoofing against the public, you'd need to make use of public-key cryptography.