A secure distributed protocol in a competitive environment of a CTF contests kind

The possibility of using distributed protocol in a competitive environment is demonstrated. A mathematical method of holding task-based CTF contests under threat of DDoS attack against organizers' servers is used as an example. For the purpose, a decentralized protocol distributing some organizers' functions among participants is proposed. The protocol meets the main security requirements due to the competitive nature of CTF contests. Its stability against the possible attacks are researched.

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