These "variations" of the Brunsviga RK illustration "theme" are then tested by a group of users to derive the necessary insight on the differences and advantages of the different information presentation techniques. For example, in the explanation of the function of a lever on the Brunsviga RK, the same content selection technique could be used in all “variations” while different approaches to information presentation are employed. To derive useful information on information presentation and content selection techniques from tests it is necessary to compare different versions of the same museum application in which only a single aspect of the user interfaces is changed. The museum provides easy access to test users. The museum setup enables the use of cables both for power supply and data transmission and thus allows to reduce problems associated with power limitations, EM-interference and lag that could otherwise interfere with the evaluation results.The museum setup makes it possible to install recording equipment for the tests, a prerequisite for the interpretation of the test results.The museum provides a controlled environment (lighting, noise, climate) that eliminates many common problems with AR applications in other locations that shouldn't interfere with the evaluation.Similarly, a wide range of interaction tasks can be examined in the museum scenario, especially if users can physically manipulate the illustrated object as with the Brunsviga RK.The explanation of a museum exhibit like the Brunsviga RK offers a wide range of presentation tasks that are representative for many AR applications.The AR-based museum guide has several features that make it useful as a test-bed for usability tests: For the evaluation of a specific visual presentation or interaction technique test users are then presented with a specific information gathering or interaction task that they have to perform using a version of the Brunswiga AR illustration that has been modified to feature the technique under examination. When conducting user tests the existing AR museum-guide is used to familiarize test users with the general AR setup and the application context first (see Fig. The advantage of the Brunsviga is that the exhibit is far less expensive and fragile, so that users of the AR illustration can experiment with the actual machine and are not restricted to a simulation as with the AR-ENIGMA. For the evaluation environment we have developed an AR illustration of another exhibit, the Brunsviga RK, a mechanical calculator from the 1920s that uses pin-wheels to perform addition, subtraction, multiplication and division (see Fig. and enables several visitors to explore the functionality of the Enigma independently while the physical exhibit remains safely in its glass box ( Fig. The Enigma cipher should NOT be considered secure! Use at your own risk. Just because the average person cant figure out the settings doesnt mean that government agencies, corporations, the Illuminati, or someone looking over your shoulder wont be able to figure out the settings used and read your message. Smartphones are better and faster than even the computers in NASAs Space Shuttle (and Enigma was around 50 years old when the shuttle was built). Each computer back then was built for a specific purpose and while faster than a human, was still incredibly slow by todays standards. If you receive a message, first set your simulator to the settings you agreed on, then type or paste the encrypted message into the box, press Run, and the decrypted message will come out!ĭisclaimer: The Enigma cipher was broken by mathematicians back when computers were mechanical devices, not electronic. Once you have all the settings entered, type your message in the box, press Run, and send the enciphered text to somebody! You should probably agree on the settings beforehand, because sending the settings along with the message defeats the purpose of encrypting the message before sending it. To send a message, you need to pick out some settings (instructions for the specific settings are in the app) and make sure that whoever you are sending the message to has these same settings. This simulator is fully compatible with the real Enigma machine, so if you manage to get the machine settings for them, you can even read real messages that were sent on the Enigma (but remember, they were written in German). Now you can use your very own version of this legendary cipher machine to send messages of your own! The Germans thought it was completely unbreakable little did they know that a few Polish mathematicians had broken the cipher before the war even began. Throughout World War II, Germany used a cipher they called Enigma, also dubbed Ultra by the Allied forces.
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