Further, many of the people who attack encryption mechanisms are very far from being morons. They will attack the encryption system in ways that the designers never anticipated. Thieves will not limit themselves to nail files. They will attack the lock, the hinges, freeze the door then shatter it, melt the door, deform the door, use shaped explosives, etc., etc., etc. All this is explained in two excellent articles by Bruce Schneier, author of Applied Cryptography, 2nd Edition, the leading treatise on the subject.
Experts advise sticking with a program from a reliable vendor with a track record.
Select one that has been thoroughly tested. Further, PGP is enormously easier to use in real life. Encryption products on the market today are generally not compatible. No alternative product has such an elegant, reliable mechanism for finding so many public keys. How To Protect Your E-mail at this site.