EasyPG Assistant extends Dired Mode for GNU Emacs to allow users to easily do cryptographic operations on files. For example,
M-x dired (mark some files) : e (or M-x epa-dired-do-encrypt) (select recipients by 'm' and click [OK])
The following keys are assigned.
Decrypt marked files.
Verify marked files.
Sign marked files.
Encrypt marked files.