The SLAN project is focused on developing a flexible open source Virutal Private Networking system, primarily for securing Internet uplinks which use broadcast media such as 802.11 wireless links or public/shared ethernets. The system is flexible enough to support traditional VPN applications as well. As well as featuring an open design and strong security, the SLAN project hopes to eventually provide support for all major computing platforms.
libdvdcss is a cross-platform library for transparent DVD device access with on-the-fly CSS decryption. It currently runs under Linux, FreeBSD, NetBSD, OpenBSD, BSD/OS, Solaris, BeOS, Win95/Win98, Win2k/WinXP, MacOS X, HP-UX, QNX, and OS/2. It is used by libdvdread and most DVD players such as VLC because of its portability and because, unlike similar libraries, it does not require your DVD drive to be region locked.
CKS is an openPGP (RFC2440) compliant public key server. It is currently under development. It is written in C, and runs on Linux. It uses PostgreSQL for key storage, and supports the hkp protocol (it can interface with GnuPG and NAI PGP). The keyserver is mostly functional, and there is a link to a running copy on the homepage.
KCrypto is a KDE2 file encryptor. It uses the Rijndael public domain C++ class implementation, and is capable of encrypting and decrypting every kind of file (text and binary) in CBC mode with a 32-byte key (256 bits) very quickly. Its purpose is to provide a more secure alternative to passworded .zip files or giving the user the chance to store or send a file via the Internet in reasonable security.