If you're ever in the area, NSA's public museum is 100% worth a visit. Not surprisingly they skip over things that make them look bad, but it's really cool to b

If you're ever in the area, NSA's public museum is 100% worth a visit. Not surprisingly they skip over things that make them look bad, but it's really cool to be able to play with real enigma machines. They do have an exhibit on secure telecommunications hardware, although I don't remember if this device is included (IIRC it's mostly landlines and more modern cell phones)