Via Things Magazine (lots more to explore there), we get the chance to revisit the electromechanical rotor cipher machine, the advanced HX-63 developed by a private Swiss firm, which would prove difficult to crack even by contemporary standards and in 1952 was exponentially more secure than the CIA’s top model. Over the course of a decade, only about a dozen of the units were manufactured and though most clientele remained anonymous, the French defence ministry was one known buyer and a defence contractor found the device in a Cold War communications bunker and restored it to working order. The potential of those above undisclosed purchasers to be forces not aligned with Western interests caused the intelligence agency to intervene and not only eventually stop their sales but also to enter into a partnership with the company to produce a model with a backdoor so the CIA could decrypt any transmission. More from IEEE Spectrum at the link above including a video demonstration of the restored, uncompromised model and more on how the technology works to encode messages.
synchronoptica
one year ago: INTERPOL (1923)—with synchronoptica—plus divination through cheese
seven years ago: an appreciation of composer Edvard Grieg, a meditation on the dacha plus cabmen’s shelters
eight years ago: restoring the Houses of Parliament, the debut of Star Trek, a Buddha-inspired knitted cap plus the debut of Voyager
nine years ago: a partially submerged art installation in the Thames is a statement on climate change
ten years ago: window displays, NATO talks on the Russian invasion of Ukraine plus a visit to Bad Vilbel