Some of the recent leaked docs point to the NSA having problems with PGP these days, but the rumor back in mid-90s was that they successfully broke it in multiple ways, which lead the Feds to drop the case against Zimmerman.<p>No idea of the validity of this story, but it seems plausible at least:
<a href="http:&#x2F;&#x2F;kraut.co&#x2F;2015&#x2F;02&#x2F;28&#x2F;1994-when-the-nsa-loved-pgp&#x2F;" rel="nofollow">http:&#x2F;&#x2F;kraut.co&#x2F;2015&#x2F;02&#x2F;28&#x2F;1994-when-the-nsa-loved-pgp&#x2F;</a>