The rsa perl t-shirts are no longer available. The only remaining
related shirt I am aware of is one sold by thinkgeek, which is
perl rsa dolphin, rsa key gen and encryption in perl, pari and dc.
If you are interested in printing your own t-shirts, all of the art
work that was used to create the shirts is available for
The rest of this page is of historical value only.
These are the "shirt of the sig". See the
export-a-crypto-system signature page for
In the US this shirt was theoretically illegal to export (or even to let a
foreign national see!) due to the EARS. Recent changes mean that you may
need to notify the USG of intent to export.
(Click either image for bigger image: 60k)
Comments, html bugs to me
(Adam Back) at