Life in cipherspace
As the old saying goes, “When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.” I don’t think we have a whole lot to worry about: here’s a home-built version of the Army’s M-94 ciphering tool, with every bit (84-bit, more precisely) as much precision as the high-dollar Pentagon original. It looks like this:
In practice, you wouldn’t have letters in color, but this was built purely as a demonstration device.
And I repeat here the warning issued by the guy who made it:
It may be illegal in some countries for you to build cipher devices yourselves or use them. In fact it may have been illegal for you to read this blog!
(Suggested by the Pergelator.)
