BROKEN: Charles V's secret diplomatic code

Fascinating story, seen via Bruce Schneier.

In the 1500s, Holy Roman Emperor Charles V/Spanish King Charles I had as his most vigorous foe Francis I, king of France. Francis was of course worried about Hapsburg encirclement, worried enough to even make an alliance with the "dreaded Turk."

Charles, in turn, was worried enough to fear French assassination. Worried enough about rumors to that end to write one of his diplomatic representatives in Paris about them in a code. A code now broken after cryptographers looked at an original note.

Gordon at Skeptophilia claims Charles' fear was unfounded and that he was "always a bit paranoid." I don't think either is true. There may have been no actual plot, but the Francis-Charles battle was already nearly three decades old by this point. In addition, as I've blogged on my religion and philosophy blog, Charles V did NOT whack Luther after the Diet of Worms and did NOT desecrate his grave after the Schmalkaldic War. That said, the day before, he claimed outrightly that the Sponsion coin is legit, when in reality, among academic types, that's nowhere near settled, and a month ago, referenced the original fundagelical discoverer of the Mt. Ebal curse tablet uncritically. (More here on how much of a circular reasoning fail it is, in a generally good r/AcademicBiblical piece except the one fundagelical there.)