_malloc is a library that is able to randomize the normal malloc function to make it more secure from possible memory reading. It allocates data in bits with random keys, without increasing size or the time required to access the data. The library includes rewritten versions of all ANSI C functions for memory use (such as memset and memccpy). There are also some functions for debugging, querying the memory status, and changing the keys.
stegnate is a program to hide data in BMPs or WAVs. stegnate-gtk is the GTK version. Under GTK versions later than 1.2, it may not compile, but it works from a command prompt and doesnt need GTK at all. At the moment, this software can only hide data in 8 or 16 bit BMPs and 8 or 16 bit WAVs.
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.
Apache Rampart/C is the security module for Apache Axis2/C. It features many ways to protect SOAP messages exchanged. This includes SOAP message encryption and signatures as specified in the WS-Security specification. In addition, Apache Rampart/C configurations are based on security policy assertions as per the WS-Security Policy specification.
The MD5 message digest library implements the MD5 message digest algorithm specified in RFC 1321 directly from the specification, without copying from the reference implementation and therefore without requiring mention of RSA when used. It uses the same unrestricted-distribution license as zlib.
GPGlist is a Perl script to implement gpg encrypted alias lists in a mail server such as Sendmail or Postfix. It uses one XML config file to store information about lists. It backs up messages if an error occours, and sends out error messages to the sender of the mail. You can decide whether or not a list only accepts encrypted messages.