Seahorse is a Gnome front end for GnuPG - the Gnu Privacy Guard program.
It is a tool for secure communications and data storage.
Data encryption and digital signature creation can easily
be performed through a GUI and Key Management operations
can easily be carried out through an intuitive interface.
Libecc is an elliptic curve crypto library for C++ developers.
knockd is a port-knock server. It listens to all traffic on an ethernet
(or PPP) interface, looking for special "knock" sequences of port-hits.
A client makes these port-hits by sending a TCP (or UDP) packet to a
port on the server. This port need not be open -- since knockd listens
at the link-layer level, it sees all traffic even if it's destined for
a closed port. When the server detects a specific sequence of port-hits
port-hits, it runs a command defined in its configuration file. This
can be used to open up holes in a firewall for quick access.
libfprint is an open source software library designed to make it easy for
application developers to add support for consumer fingerprint readers to
their software.
kQOAuth is a library written in C++ for Qt that implements the OAuth 1.0
authentication specification RFC 5849 (http://tools.ietf.org/html/rfc5849).
Greetings go to Dominik Kapusta for writing the original OAuth library
using Qt, QOAuth (http://blog.ayoy.net/2009/6/24/oauth).
A user authentication and authorisation framework plugin for Dancer apps.
Makes it easy to require a user to be logged in to access certain
routes, provides role-based access control, and supports various
authentication methods/sources (config file, database, Unix system
users, etc).
Designed to support multiple authentication realms and to be as
extensible as possible, and to make secure password handling easy (the
base class for auth providers makes handling `RFC2307'-style hashed
passwords really simple, so you have no excuse for storing plain-text
passwords).
Deadlock is an open source user authentication/password protection
system written in PHP/MySQL and licensed under the GNU GPL. It uses
.htpasswd and .htaccess files to protect any web directory.
Gnome-keyring is a program that keep password and other secrets for
users. The library libgnome-keyring is used by applications to integrate
with the gnome keyring system.
libgpg-error is a library that defines common error values
for all GnuPG components. Among these are GPG, GPGSM, GPGME,
GPG-Agent, libgcrypt, pinentry, SmartCard Daemon
and possibly more in the future.