* What's this?
-EasyPG is yet another GnuPG interface for Emacs. It consists of a
-transparent file encryption application and easy-to-use elisp library
-to interact with GnuPG.
+EasyPG is yet another GnuPG interface for Emacs. It consists of two
+parts: transparent file encryption utility and easy-to-use elisp
+library to interact with GnuPG.
+
+* Requirements
+
+** GNU Emacs 21.4 or later
+
+** XEmacs 21.4 or later
+
+** GnuPG 1.4.3 or later
* Quick start
* Advantages over other competitors
+There are many competitors of EasyPG such as Mailcrypt, PGG, gpg.el,
+etc. EasyPG has some advantages over them.
+
** EasyPG avoides potential security flaws of Emacs.
*** `call-process-region' writes data in region to a temporary file.
-PGG and gpg.el use `call-process-region' to communicate with a
-subprocess "gpg". So, your passphrases may leak to the filesystem.
+
+PGG and gpg.el use `call-process-region' to communicate with a gpg
+subprocess. Your passphrases may leak to the filesystem.
*** There is no way to clear strings safely.
-To prevent passphrases from been stealing from cores, `read-passwd'
-function clears passphrase strings by `(fillarray string 0)'.
-However, it is not enough. In GC sweep phase, Emacs does compaction
-on small strings. If GC happens before `fillarray', passphrase
-strings may be copied elsewhere in the memory.
-PGG and gpg.el enables passphrase caching by default.
+If Emacs crashed and dumps core, passphrase strings in memory are also
+dumped with the core file. `read-passwd' function clears passphrase
+strings by `(fillarray string 0)'. However, it is not perfect. Emacs
+does compaction of small strings in gc_sweep phase. If GC happens
+before `fillarray', passphrase strings may be copied elsewhere in
+memory. So, it is recommended that if you are done with passphrase
+you should clear it manually. However, PGG and gpg.el enables
+passphrase caching by default.
+
+** Most GnuPG features are accessible from Emacs
+
+As the name indicates, EasyPG is inspired by GPGME (GnuPG Made Easy),
+and the library interface is close to GPGME.