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Updated: 040806

Clients
www.gnupg.org
The home of GnuPG, a complete and free replacement for PGP.

www.pgp.com
The PGP Corporation.

www.pgpi.org
The International PGP Home Page. Here you may download the latest GnuPG and freeware PGP version for your platform.

Keyservers
keys.se.linux.org
sks.keyserver.penguin.de
keyserver.bu.edu
keyserver.aarg.net
sks.dnsalias.net
pgp.lu.gnu.org
keyserver.noreply.org
thedungeon.dnsalias.net
keyserv.dannyj.dynip.com
keyserver.kjsl.com

Keyserver software
www.nongnu.org/sks
Synchronizing Key Server

pks.sourceforge.net
OpenPGP Public Key Server

www.openpksd.org
OpenPKSD

www.cryptnet.net/fsp/cks/index.html
CryptNET Keyserver

http://www.earth.li/projectpurple/progs/onak.html
Onak

Keysigning
Nyckelsignering
Local document (in Swedish)

www.biglumber.com
Key signing coordination

www.toehold.com/robotca/
RobotCA is a program that signs PGP keys automatically.

www.cryptnet.net/fdp/crypto/gpg-party.html
GnuPG Keysigning Party HOWTO

Keysigning protocols
Efficient Group Keysigning Method (Zimmmermann-Sassaman)
Manoj's Keysigning Protocol
Median Keysigning Protocol

Mailing lists
lists.alt.org/mailman/listinfo/pgp-keyserver-folk
A general key server mailing list.

cryptorights.org/lists/pgp-users
The PGP-USERS List is the long-running list for the community of PGP, GnuPG and OpenPGP encryption users.

lists.gnupg.org/pipermail/gnupg-users/
A general [GnuPG] discussion and help forum.

Misc
www.cs.uu.nl/~henkp/henkp/pgp/pathfinder/mk_path.cgi
PGP pathfinder & key statistics.

www.lysator.liu.se/~jc/wotsap/
Web of trust statistics and pathfinder.

thomas.butter.dk/gpg.php
MSD statistics for keys in the SCS.