* What's this?
-EasyPG is yet another GnuPG interface for Emacs. It consists of two parts:
-
-- "The EasyPG Assistant"
- A GUI frontend of GnuPG
-- "The EasyPG Library"
- A library to interact with GnuPG
-
-NOTE: EasyPG is neither a fork nor a re-implementation of PGG.
+EasyPG is a GnuPG interface for Emacs. It has two aspects: convenient
+tools which allow to use GnuPG from Emacs (EasyPG Assistant), and a
+fully functional interface library to GnuPG (EasyPG Library).
* Requirements
M-x dired
(mark some files)
: e (or M-x epa-dired-do-encrypt)
- (select recipients and click [OK])
+ (select recipients by 'm' and click [OK])
+
+* MUA Integration
+
+The EasyPG Library can be used in combination with various MUA (Mail
+User Agents).
+
+** CVS version of Gnus
+
+CVS version of Gnus uses EasyPG by default. To make sure of that,
+check mml2015-use set to 'epg. Other options which affect on the
+EasyPG are
+
+ mml2015-signers
+ mml2015-encrypt-to-self
+ mml2015-cache-passphrase
+ mml2015-passphrase-cache-expiry
+ mml2015-verbose
+
+NOTE: You don't need pgg-epg.el in this case.
+
+** PGG based MUA
+
+PGG is outdated PGP library used by old Gnus (<= v5.11), MH-E, etc.
+
+There is a PGG backend written EasyPG called pgg-epg.el. However,
+EasyPG API is a superset of PGG and pgg-epg.el provides nothing but
+compatibility with PGG.
+
+Limitations of PGG
+
+- PGG doesn't have a user interface to select keys for typical
+ cryptographic operations
+- PGG can't handle messages signed with multiple keys correctly
+- PGG trusts any keys for encryption
+
+** SEMI based MUA
+
+SEMI is the MIME library used by Wanderlust, cmail, T-gnus, etc.
+
+There is an EasyPG capable SEMI library called EMIKO-EasyPG. It can
+be downloaded from the same site of the EasyPG distribution point.
* Security
-There are security pitfalls around Emacs.
+There are security pitfalls around Emacs. EasyPG is written with
+avoiding them.
** Passphrase may leak to a temporary file.