A perfectly encrypted message is actually indistinguishable from the noise, because then you wouldn't even know to intercept it. In theory, for example, there's an old method of encryption called a one-time pad. It could just as well be another message that has the same number of letters as my name is Neil deGrasse Tyson. If aliens want to communicate with us, they would find a pretty efficient way to send a signal to reduce the energy cost for them.
Neil deGrasse Tyson chats with whistleblower Edward Snowden via robotic telepresence from Moscow. In Part 1, they discuss Isaac Newton, knowledge and learning, the Periodic Table, encryption and privacy, and much more.
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