I&#x27;m trying to find a source. But when I was first introduced (well, investigated and made brief use of) PGP years ago I read an article on the history of it and Zimmerman. Terrorists were found to be using PGP in the 1990s. That they&#x27;re using encryption is not new, the same discussion was around back then as we&#x27;re having today, with many of the same features.<p>EDIT:<p><a href="http:&#x2F;&#x2F;interviews.slashdot.org&#x2F;story&#x2F;01&#x2F;09&#x2F;24&#x2F;162236&#x2F;philip-zimmermann-and-guilt-over-pgp" rel="nofollow">http:&#x2F;&#x2F;interviews.slashdot.org&#x2F;story&#x2F;01&#x2F;09&#x2F;24&#x2F;162236&#x2F;philip-...</a><p>I posted that link on another comment. But it addresses this one to some extent, he also mentions that the terrorist use of encryption was a significant issue in the 1990s. Still can&#x27;t find the source for my original comment.