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A Tool for Privacy on the Internet
Web Surfing without TracesWe offer an easy to use Open-Source software for everybody: JAP helps to protect your privacy and covers all digital traffic. Most existing systems for anonymous communication reduce the security to achieve higher performance. Our final system provides strong anonymity; i.e. the system withstands so-called traffic analysis. That means, even an adversary who could eavesdrop any Internet communication or link will not get any information about who is communicating with whom. Our System: JAPThe system consists of a client software (called JAP) and a chain of several intermediate servers. Here are the two most common scenarios for using JAP:
How it worksJAP acts as a local proxy between the browser and the insecure Internet. All requests for web pages are handled by JAP and are encrypted several times. The encrypted messages are sent through a chain of intermediate servers (named Mixes by the inventor of the theoretical background, David Chaum) to the final destination on the Internet. Multiple layers of encryption protect all messages. A Mix collects messages in a batch, totally changes their appearance (removes one layer of encryption) and forwards them all at the same time, but in a different order. An adversary may observe all communication links, however he cannot determine a relation between incoming and outgoing packets. A surfer remains anonymous within the group of all users of the service. Demonstrably, the system protects your privacy as long as the Mix works correctly. Unfortunately nobody knows whether a certain Mix is actually trustworthy or not. Therefore we use a whole chain of Mixes. Each message passes through several Mixes and the entire chain of Mixes has to be corrupt to successfully observe the user's activities. The chaining effectively prevents single Mixes from observing. This is the meaning of strong anonymity: Even the anonymity service itself cannot spy on its users. Privacy policy:
Download JAPAttention! JAP is available for free and already protects your privacy against most observers, like your ISP, your network operator or your boss. However, this version does NOT yet achieve the full security or anonymity that we strive for. It does not protect you against an adversary who observes all communication links on the Internet. Please select your system: If you want to get information about new versions of JAP and other important changes, please subscribe to our mailing lists. Help and FAQOnline help and Frequently Asked Questions (FAQ) Developer pagesInformation about joining the developer group is available on our developer pages. You will find the newest source codes of JAP, Mixes and InfoService, you can submit bug reports and join mailing lists / discussion groups. FeedbackDo you have suggestions, like to submit a bug report or ask for help? Send an E-Mail to: jap@inf.tu-dresden.de If you want to protect your E-Mail from eavesdropping, use our pgp key. Finger print: B965 99E4 05EB 4202 895C 27DC D022 60C9 73EE 1DD1 Maintenance timesWe apologise for the inconvenience caused because we cannot guarantee our service (mixes, Infoservice, Website, Download, ...) is failsafe:
The challengeWe are looking for partnersISPs, IT security companies, networking companies, privacy commissionerswho are willing to operate a Mix and would like to support the idea of providing a world wide anonymity service. We are open to partners who want to discuss commercialization of our service. The client program (JAP) is running on the Java platform. JAP works on all major platforms, for instance Windows, Macintosh, Linux, Solaris etc. The Mix-servers are written in C++ and work on many different platforms including Windows NT, Linux, Solaris, Irix and other Unix-like operating systems. JAP and Mixes are Open-Source software. Everyone may inspect it and make sure, that the software provides the expected functionality and does not have hidden trapdoors. Contact information
University of Technology Dresden E-Mail: jap@inf.tu-dresden.de WWW: http://anon.inf.tu-dresden.de/ JAP is a software development within the Project Anonymity in the Internet sponsored by the German Research Foundation and the Federal Ministry of Economics and Technology. | ![]() |
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