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A method for organizing a secure multi-participant online contest is disclosed. The method includes creating encrypted contest data parts with a set of encryption keys that have a corresponding set of decryption keys. The contest starting time is announced and the encrypted contest data parts are made available to a group of contest participants. The decryption keys are transmitted to the contest participants in accordance to a contest time flow. In some examples, the encrypted contest data parts allows for contests that include multi-step and multi-part questions.