In the MTC3 challenges in the levels I to III the website automatically verifies if your solution is correct. The solution may be the entire plaintext, the key, or a secret codeword hidden within the determined plaintext. By breaking the cipher you will obtain this solution. If you think you have found the correct solution, you can login to this website and submit it. Be aware that the solutions are case-sensitive! If your answer is correct, you will automatically be added to the list of successful code breakers: Every successful candidate will appear on the "Overall Hall-of-Fame". The first four successful code breakers of each challenge will we immortalized in the "Challenges Hall-of-Fame" separately for each challenge.
Take note, however, that you only have a limited number of attempts at each challenge. Therefore, you should be certain that your answer is correct before submitting a solution. Once you have used all of your attempts, you will not be able to submit additional answers for that particular challenge.
Challenges categorized as level X are not validated automatically. If you solve one of the level X challenges, you should contact the author of the challenge or the MTC3 team via email. If your solution is sound, you will be added to the Overall Hall-of-Fame. We will publish your results only with your explicit permission.
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