hashgen is a small utility written in C that computes various message digests of files. The message digests include MD2, MD4, MD5, SHA1, and eDonkey hashes. For Donkey, the full ed2k:// link is computed. The source code is based on the reference implementations in the relevant RFCs.
Java Security Component Framework (JSCF) is a pluggable security component system with a JDBC-like interface. It allows connections to be made to registered security components with defined operations used mainly for mail, such as encrypting, decrypting, verifying, and signing streams. An implementation that works with the popular gpg program is included.
Cryptosync is tool that makes compressed and encrypted incremental backups. That way, one can efficiently copy the files to another location with normal rsync. Not only are the file contents encrypted, but also the filename, mode, owner, and group information are stored encrypted.
PAM_pkcs#11 is a Linux-PAM login module that allows a X.509 certificate based user login. The certificate and its dedicated private key are thereby accessed by means of an appropriate PKCS #11 module. For the verification of the users' certificates, locally stored CA certificates as well as either online or locally accessible CRLs are used. A very flexible, stackable, and configurable Certificate-To-Login mapping scheme is provided to deduce/verify the username to log in.
The ELF-Encrypter program suite is a collection of programs to encrypt ELF binaries using various algorithms, including the ones provided by GPG. One can choose a lot of methods to obtain the encryption key, such as hashing a list of PCI peripheals, MAC addresses of ethernet cards, file inode numbers, passphrases and passwords. The suite also contains programs to manipulate and inject plain or encrypted code into ELF binaries.