a one time key is the safest way to communicate.
I think the govt can deciper PGP...I remember they couldnt export, then all of a sudden they could.
Even so, CIA probably has hackers who stole the info from PGP
The nice thing about any strong crypto is that it should stand up to attack even if you know the algorithm and implementation.
Of course if you find a flaw.... it can make anything easier to crack, especially if you have known text to work with.
You might want to check out GPG, the GNU open source version of PGP.
Wouldn't help. PGP is open source. You can study it all you want. Anyone can.