The paper is devoted to mathematical method of holding task-based CTF contests under threat of DDoS attack against organizers' servers. For the purpose, a decentralized protocol is proposed where a part of organizer role is distributed among participants. There are some important security requirements to the protocol due to the competitive nature of CTF contests. The result protocol meets these requirements. Its stability against considered attacks is researched. Directions of further research are described.
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- Title Developing safe protocol for distributed task-based CTF holding system
- Headline Developing safe protocol for distributed task-based CTF holding system
- Publesher
Tomsk State University
- Issue Prikladnaya Diskretnaya Matematika - Applied Discrete Mathematics 2 (28)
- Date:
- DOI
Keywords
распределённые протоколы, защищённые вычисления, отказоустойчивые системы, distributed protocol, secure computation, fault-tolerant systemAuthors
References
Колегов Д.Н., Чернушенко Ю. Н. О соревнованиях CTF по компьютерной безопасности // Прикладная дискретная математика. 2008. №2. С. 81-83.
https://ctftime.org/ctf-wtf/ - CTFtime.org / All about CTF (Capture The Flag). 2014.
https://www.defcon.org/ - DEF CON Hacking Conference. 2014.
http://www. phdays.ru/ - PHDays - Positive Hack Days. 2014.
http://ructf.org/ - RuCTF. 2014.
Анисеня Н. И., Стефанцов Д. А., Торгаева Т. А. Сервис BlackBox для проведения соревнований по защите компьютерной информации Capture the Flag // Прикладная дискретная математика. Приложение. 2013. №6. С. 52-56.
http://blackbox.sibears.ru/ - Blackbox. 2014.
http://sibctf.ru/ - SiBCTF. 2014.
Clarke I., Sandberg O., Wiley B., and Hong T. W. Freenet: a distributed anonymous information storage and retrieval system // Intern. Workshop on Designing Privacy Enhancing Technologies: Design Issues in Anonymity and Unobservability. N.Y.: Springer Verlag, 2001. P. 46-66.
https://www.torproject.org/ - Tor Project. 2014.
Haber S. and Stornetta W. S. How to time-stamp a digital document // J. Cryptology. 1991. No. 3. P. 99-111.
http://bitcoin.org/ - Bitcoin - Open source P2P money. 2014.
Dwork C. and Naor M. Pricing via processing or combatting Junk Mail // Proc. CRYPTO'92. Berlin, Heidelberg: Springer, 1993. P. 139-147.

Developing safe protocol for distributed task-based CTF holding system | Prikladnaya Diskretnaya Matematika - Applied Discrete Mathematics. 2015. № 2 (28).
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