In the alt text of that comic, Munroe says "Jefferson would have been all about crypto." A quick Google search confirms: not only would he have used crypto, he

In the alt text of that comic, Munroe says "Jefferson would have been all about crypto." A quick Google search confirms: not only would he have used crypto, he did use crypto: > Jefferson had used ciphers before with official as well as unofficial correspondence; letters to James Madison, John Adams, James Monroe, Robert Livingston, among others include communication in cipher. It was a way to keep "matters merely personal to ourselves" as well as a way to "have at hand a mask for whatever may need it." https://www.monticello.org/site/jefferson/jeffersons-cipher-meriwether-lewis https://www.monticello.org/site/jefferson/jeffersons-cipher-...