3 ms·
> a freak bit of random radio noise Exactly what an encrypted signal would look like. It's all too likely that it is just noise, but the only time you'd expect
by biot 10y ago
> a freak bit of random radio noise
Exactly what an encrypted signal would look like. It's all too likely that it is just noise, but the only time you'd expect non-noise from a signal is when aliens are broadcasting a public message to the universe.
- jliptzin 10y agoIf it's a public message why would it be encrypted?
- freehunter 10y agoBecause the civilization invented asymmetric cryptography before it invented sliced bread?
- biot 10y agoI think you missed the part where random radio noise is indistinguishable from encrypted communication, so you should expect non-noise (aka unencrypted) only in the case of a public message.
- londons_explore 10y agoA message which perfectly uses the radio channel capacity (ie. is very close to the shannon limit) is also indistinguishable from noise to those who don't know how to decode it. Such a signal, we would never "guess" how to decode it, since if one could guess and check, then that in itself is wasted capacity, and therefore not at the shannon limit.