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<p>for all my wanking on about crypto and smart-contracts I tend to
forget the paper currency *already* carries some of it's history
with it... rapid/portable/cheap DNA analysis and chemography or
spectroradiometry might provide analog private key
signatures... <br>
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<blockquote>
<p><a class="moz-txt-link-freetext" href="https://www.marketwatch.com/story/this-is-exactly-how-often-cocaine-and-feces-show-up-on-your-dollar-bills-2017-07-11">https://www.marketwatch.com/story/this-is-exactly-how-often-cocaine-and-feces-show-up-on-your-dollar-bills-2017-07-11</a></p>
</blockquote>
<p>if a$$holes should be worried about harrassing food-service
workers before they get their meals, it seems like they shouldn't
really want to bully people out of cash payments either?<br>
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