This feature allows you to generate keys (key files) that can be used for encryption / decryption.
1) Secret Key
This is the traditional symmetrical secret key. The same symmetrical
key is used to encrypt and decrypt the file. The secret key file
normally has the extension '.sec'.
2) Private/Public Key pair
The public key is normally used to encrypt a file, and the private
key is used to decrypt a file. The public key normally has the extension
'.pub'. The private key either has the extension '.pri' or has no extension.
3) OpenPGP Private/Public Key pair
The public key is normally used to encrypt a file, and the private
key is used to decrypt a file. This feature will only generate the OpenPGP
private and public keys. The OpenPGP key files
normally have the extension '.asc'. This feature will not generate
the OpenPGP secret and public key rings.