On Tue, 4 Jun 2013 16:30:44 -0500, Mike Schwab wrote: >>> >>> ( >>> http://www.dailymail.co.uk/sciencetech/article-2333203/Moto-X-Motorola-reveals-plans-ink-pills-replace-ALL-passwords.html?ito=feeds-newsxml >>> ) >> >The RF card in most badge reader only transmit in response to a nearby >reader emitting the correct frequency to power the device. And yes, >if you can read the response you can duplicate it on another device. >Or even just relay your signal while you are away from the reader. > There are smarter ways of implementing challenge/response. They just cost more.
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