Below are answers to questions often asked about the EFT OpenPGP module.
1. How are PGP keys stored? Are they on file system or in a database?
They are stored on the file system.
2. How are PGP keys (especially private keys) protected?
They are stored in a PGP key ring file outside the areas available to connected users. Private keys protected by a passphrase are encrypted based on your chosen cipher.