When I think of NIST, the first thing I think of is the old National Bureau of Standards (now NIST) WWV Time and Frequency broadcast on 2.5, 5, 10, 15, 20, and

When I think of NIST, the first thing I think of is the old National Bureau of Standards (now NIST) WWV Time and Frequency broadcast on 2.5, 5, 10, 15, 20, and sometimes 25 MHz. (You old-timers can probably hear the radio voice already!) This came to mind because I just read a great PDF with a detailed history and technical description of WWV and its sister stations WWVH and WWVB: http://tf.nist.gov/general/pdf/1969.pdf http://tf.nist.gov/general/pdf/1969.pdf Not directly related to 2FA, of course, but that PDF is recommended reading. These people were hardcore hackers before any of us were born!