[bigiain]

Some (well, at least one) of us are old enough to have owned one of these:

http://www.cypherspace.org/adam/uk-shirt.html

A t-shirt with a Perl script that implemented RSA encryption strong enough to be technically illegal to export from the US.

(I must sadly admit to being too cowardly/sensible to have taken that shirt to the US in the late 90s...)

[tolciho]

I wore the rsa-dolphin t-shirt all over the place and nobody batted an eye back then, but a dolphin made up of ASCII characters is quite a bit less obvious than the one you linked.

OpenBSD being based in Canada ships strong crypto, but has had a sometimes troubled relationship with certain regimes.

https://www.openbsd.org/lyrics.html#34

[dd8601fn]

DeCSS printed on stuff was a thing for a while, too.

[greyface-]

And if you missed the original run, you can buy a reprint from Adam's current company: https://store.blockstream.com/products/rsa-t-shirt