* What's this?
-EasyPG is a GnuPG interface for Emacs. It has two aspects: tools to
-use GnuPG from Emacs (The EasyPG Assistant), and a fully functional
-library to interact with GnuPG (The EasyPG Library.)
+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
** CVS version of Gnus
-CVS version of Gnus has the native EasyPG binding, simply put the
+CVS version of Gnus supports EasyPG natively. To use, simply put the
following line into your ~/.emacs.
-(setq mml2015-use 'epg)
+ (setq mml2015-use 'epg)
Other options which affect on the binding are
-mml2015-signers
-mml2015-encrypt-to-self
-mml2015-cache-passphrase
-mml2015-passphrase-cache-expiry
-mml2015-verbose
+ mml2015-signers
+ mml2015-encrypt-to-self
+ mml2015-cache-passphrase
+ mml2015-passphrase-cache-expiry
+ mml2015-verbose
-NOTE: You need not to install pgg-epg.el in this case.
+NOTE: You don't need pgg-epg.el in this case.
** PGG based MUA
-PGG is somewhat outdated PGP library used by old Gnus, MH-E, etc.
+PGG is outdated PGP library used by old Gnus (<= v5.11), MH-E, etc.
-There is a PGG backend using EasyPG called pgg-epg.el. However,
-EasyPG API is a superset of PGG, so pgg-epg.el just emulate the old
-behavior of pgg.el. Major features which PGG lacks are
+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.
-- Key selection interface
-- Web of trust support
-- A mechanism to investigate the verify result
-- S/MIME support using gpgsm
+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
* 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.