Jason Koebler writes: In late May, hacker artist David Huerta, co-organizer of Art Hack Day and Cryptoparty, sent the NSA one hell of a snail mail. Huerta built a DIY encrypted mixtape using an Arduino board and a transparent acrylic case, containing a "soundtrack for the modern surveillance state." It's a mixtape the NSA won't be able to listen to because of the power of private key-based cryptography.
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