Open Source Linux Security Software

CTFd is a Capture The Flag framework focusing on ease of use and customizability. It comes with everything you need to run a CTF and it's easy to customize with plugins and themes. Create your own challenges, categories, hints, and flags from the Admin Interface. Dynamic Scoring Challenges. Unlockable challenge support. Challenge plugin architecture to create your own custom challenges. Static & Regex-based flags. Custom flag plugins. Unlockable hints. File uploads to the server or an Amazon S3-compatible backend. Limit challenge attempts & hide challenges. Automatic bruteforce protection. Individual and Team-based competitions. Have users play on their own or form teams to play together. Scoreboard with automatic tie resolution. Hide Scores from the public. Freeze Scores at a specific time. Scoregraphs comparing the top 10 teams and team progress graphs. Markdown content management system. SMTP + Mailgun email support. Email confirmation support. Forgot password support.

An attempt to collect (read rewrite) a set of tools for Ultima Online game playing. Many tools are closed source or discontinued: no way to enhance them with no sources. Here there will be such tools and sources.

A webapp hacking game, where players must locate and exploit vulnerabilities to progress through the story. Think WebGoat but with a plot and a focus on realism&difficulty. Contains XSS, CSRF, SQLi, ReDoS, DOR, command injection, etc

RufaSlider is a collection of 16 different block slider puzzles for kids and casual puzzlers that works on laptops and PCs running Windows, OSX or GNU/Linux. It includes a Klotski-style family, a DirtyDozen family, and a Traffic-Rush family. And now these puzzle families come with AutoSolvers to help you. The Klotski family uses rectangles of 4 sizes: 1x1, 2x2, 1x2, 2x1. The objective in each game is stated near the window top, but usually involves moving a large block to a specified location within the window. The DirtyDozen family is similar except there are L-shaped puzzle pieces. The Traffic-Rush family uses data, with 2x1, 1x2, 3x1, 1x3 rectangles. Here, the long rectangles represent cars or trucks that can only move [roll] lengthwise...the goal being to move the red car toward the shaded "exit door". The proper command to extract the archive and maintain the directory structure is "7z x filename".

Ever wanted a random key generator? With SimpleKey, you can generate random keys up to 500 characters in length and save them to text files. These keys can be all numerical, alphanumeric, all alphabetical or the previous three plus special characters. You may use your generated key for whatever purpose. SimpleKey also includes a hash table with which to hash strings and files alike. Hash algorithms include: MD4/5, Sha, Skein, Keccak, Grostl, JH, and Blake.

This is a minimalist version of the Sokoban puzzle game that runs on Windows, OSX, and Linux. The best thing about this game that is different: you can use the built-in solvers a little bit.. Sometimes I want to know the best next move or two, but no more. Other times I want to solve part way and watch the solver step thru the remainder of the solution at whatever speed I choose.

Cryptomak contains cipher and tools for encryption utility written in php such as substitution, vigenere, affine, transposition and index of coincidence. It is powered by Phrame platform which implements MVC design and Smarty template engine.

<b>IVJ MUD (Masive Multiplayer Text Game) is a SSL-based soft:<br>-Client (GUI)<br>-Server (GUI)<br>-Applet (GUI)<br>-Protocol (SSL-based, use of localization files that store strings to reduce trafic and allow for instant i18n.<br> LOOKING FOR HELP!</b

This ain&#39;t your daddy&#39;s crypto! We provide a set of C libs and utilities to perform cypherpunk style crypto functions, using your existing OpenPGP keys. Ring signatures; credentials; mental poker; timelines; zero knowledge proofs. Cool stuff!

With BinaryCrypt, you can convert between regular text, binary, hexadecimal, octal decimal and decimal. You can convert only decimal (as of right now) to any base up to base 64. You can also save your converted text to a file or open a converted text file to decrypt the message, and perform basic arithmetic in binary. The git repo for the C# code is located at: https://github.com/m1r4g3/BinaryCrypt-.Net

A daemon for hosing a Defcon style Capture The Flag hacker competition. The ctfd process will deliver flags, verify their presence and receive captured flags from the different teams.

CivilAction lets you create a Choose Your Own Adventure type story that can be played on Java enabled cell phone. A desktop application lets you write story files. People run the story on their phone. Make a 'Tresure hunt' or 'Amaze Race' type game.

Here is a little utility I wrote to facilitate my work when I have to try methods on deciphering coded messages. Well, of course for all those who do not treasure hunts, it may seem slightly unnecessary. So for them, it can also be used to encode a messa

Extendable game server for a Linux Deathmatch. Basically, a Linux Deathmatch is a realtime hacking competition where several teams share a network and try to set up services, for which they get scores, and hack the other players.

Cooperative Fair Event Outcome Selection in a hostile environment.

HumanSudokuSolver is intended to solve Sudoku puzzles in a way human beings would do (non brute force). It currently solves most of the puzzles I tried and can output a step-by-step solution. Developers who want to contribute are welcome!

Java implementation of Sudoku. Visually attractive, interactive version with intelligent and brute force solving strategies.

OpenInfreno is an open source root wars toolkit & engine designed to score attackers accessing a network of victims. This project consists of a score server and several tools, as well as documentation and implementation information.

A java application for creating, playing and solving SuDoku puzzles of various types. Features both a Swing GUI and command-line operation. The automatic solving of puzzles uses "smart" techniques rather than a brute force search of every possibility.

Computer chess engine written using Qt4, which works under Knights, Jose, Arena and other chess board GUI games. Uses bitboard game representation and alpha beta brute-force search to analyse chess positions.

This software uses a genetic algorithm to "evolve" reactor designs for Schema's space-simulation game, Star-Made (http://star-made.org/). One of the more unique aspects of the game is that ship power management is not as simple as filling a cube with power generation blocks. This mechanism leads to difficulties in getting maximal power generation out of such reactors. This program rectifies this issue by using a self-organizing variant of brute force search. Much of the search space is pruned early on by a user-selectable fitness function. Within a few epochs, reactor output quickly converges to several sub-optimal, yet high-output reactors. Given enough time, the idea is that the optimal reactor configuration will be yielded.

SLPasswordSuite offers you multiple choices to work with the password stored in Second Life clients.

StegoGO is an open source software that allows the embedding of hidden data in GO games, using GNUGo. It allows both the embedding of hidden data in an already existing GO game, and the creation of new GO games to hide data.

This is a simple app, created around an original sudoku solver based only on heuristics, not brute force. It's coded in Java/SWT(GUI toolkit). It's an example of MVC and of Visitor, Observer, Strategy, Abstract Factory, Singleton Design Patterns.

A set of tools for manipulating and solving pencil-and-paper style ciphers, cryptograms, and related puzzles.