Modern cryptography owes its lineage to military communications. Alan Turing's success at cracking the Enigma code was equally important to the Allied's success. A public directory is used to keep part of the encryption code. Netscape is a licensee of RSA algorithm technology for secure transactions on the world wide web. Network security is only as good as the first hacker that can come along and break the encryption code.
Any computer geek can figure out how to get in there.
And they will do it too. Now I would not feel comfortable going to an ATM machine with a screwdriver and fiddling with the software there but at my own house I would feel comfortable, absolutely. The strength of electronic encryption is only ever equal to the algorithm necessary to decode it. And while Netscape offers cash rewards to the finders and fixers of the security holes, the latest technology in encryption, Quantum Cryptography, is also the same means by which those codes can be cracked.