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MTD-SDR 시스템의 취약요소 변경에 따른 악의적 공격 성공 확률

Malicious Attack Success Probability on the Change of Vulnerable Surfaces in MTD-SDR System

  • 기장근 (공주대학교 전기전자제어공학부) ;
  • 이규대 (공주대학교 정보통신공학부)
  • 투고 : 2018.08.09
  • 심사 : 2018.10.05
  • 발행 : 2018.10.31

초록

MTD(Moving Target Defense)는 자가 복원력이 있는 무선 통신 시스템을 구축할 수 있도록 대상 시스템의 다양한 구조 및 운영 관련 파라미터들을 동적으로 변경시키도록 설계함으로써 공격자의 악의적 공격으로부터 시스템의 취약점을 보호하는 기술이다. 본 논문에서는 MTD-SDR 기술을 기반으로 하는 통신 시스템에서 랜덤/순서적 스캐닝/재밍 공격 성공 확률에 대한 식을 유도하고 시뮬레이션을 통해 그 결과를 검증하였다. 결과적으로 랜덤 스캐닝 공격의 경우에는 전송채널 변화주기 값이 증가할수록 공격성공률이 증가하는 반면, 랜덤 재밍 공격의 경우에는 변화가 없다. 순서적 공격의 경우에는 랜덤 공격과 유사한 경향의 성공률 패턴을 보이지만 전송채널 변화주기가 커져서 전체 전송채널 수에 접근할수록 재밍 공격의 경우에는 최대 2배, 스캐닝 공격의 경우에는 최대 36% 정도 랜덤 공격에 비해 공격 성공률이 높은 것으로 나타났다.

The MTD-based approach changes various operating parameters dynamically so that the vulnerability of the system can be protected from the malicious attack. In this paper, random/serial scanning/jamming attack success probabilities have been mathematically analyzed and verified through simulation to improve the security of the wireless communication systems in which the MTD-SDR technologies are applied. As a result, for random scanning attacks, attack success probability increases as the change period of transmission channel increases, while for random jamming attacks there is no change. The attack success probability patterns for serial attacks are similar to those of random attacks, but when the change period of transmission channel approaches to the total number of transmission channels, the success probability of serial attack is getting greater than that of random attack, up to twice in jamming attacks and up to 36% in scanning attacks.

키워드

참고문헌

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