[Cryptography] Generate Random Data From Sound Card

[John Gilmore]

Kent Borg and Jon Callas wrote:
> > > [...] the Kent who has currency in his wallet with serial numbers of it, and though those serial numbers are in no way "truly random", it is exceedingly likely no one in the world knows what those serial numbers are...
> Oh, yes. This is one of the points I was trying to make. All we need is something that is arbitrarily hard for an adversary to guess...

Do you both really believe that that modern ATM machines aren't recording
the serial numbers of the paper cash that they issue to you?

And that those "money counting" machines that they use in banks to
accurately count hundreds of bills when you ask to take out cash, or
deposit large amounts of cash, are similarly not recording serial
numbers?

Remember, this is the government that subverted every color laser
printer in the world to print serial numbers in every printed image, so
they could track who prints images of money (and many other images of
interest to governments).

  https://en.wikipedia.org/wiki/Printer_tracking_dots

	John
	
PS: And if you didn't think the US Post Office was photographing and
OCR-ing the envelope of every letter sent through the postal mail, check
out:

  https://www.usps.com/manage/informed-delivery.htm