tarmill compresses and encrypts tar archives, and is designed for use in backup scripts. Unlike most other solutions, each archive member is handled separately, so damage in the middle of the archive does not render the rest of the archive unusable; it is possible to resume at the next readable member header. Compressed and encrypted archives remain valid tar files, so any well-behaved tar implementation will be able to list (but not extract) them.
tcpick is a textmode sniffer that can track TCP streams and saves the data captured in files or displays them in the terminal. It is useful for picking files in a passive way. It can store all connections in different files, or it can display all the stream on the terminal (using colors too).
The te-edu Password Meter class can be used to check whether a password is strong enough to not be guessed easily. It can perform several tests on a given password string to compute a score that represents the strength of a password. Password checking is based on brute force attack class A and considers 10 million password checks in one minute. It checks characters, character pairs, repeated characters, time needed to be discovered, character standard entropy, etc.
tinysofa classic server is a small, fast and secure operating system. It is Linux 2.4 based, and is compiled with IBM's stack smashing protection patch for GCC. It features a small installation size, APT as an advanced package management tool, secure defaults and services, and much more.
tkccrypt is a small text file editor frontend for Peter Selinger's ccrypt written in basic Tcl/Tk. The program allows opening and storing only encrypted files, and it guarantees that the decrypted content is never written to disk. Its target audience is made up of users who don't feel confident using a console encryption tool, but need encryption for some text data. The dependency only on ccrypt and Tcl/Tk makes this program very easy to run on many Unix systems.
tmin is a quick and simple tool to minimize the size and syntax of complex test cases in automated security testing. It is meant specifically for dealing with unknown or complex data formats (without the need to tokenize and re-serialize testcases), and for easy integration with UI testing harnesses.
Tomld (tomoyo learning daemon) is an extension to the Tomoyo security framework. Tomoyo increases security by confining applications and services into domains using rules. Tomld automates this process, helping users harden their systems more easily. To do this, tomld starts in learning mode, creates Tomoyo domains, collects rules, changes them, and, once the rules appear to be complete, tomld enforces the policy.