• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권12호
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• pp.6214-6242
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• 2019

Routing in mobile ad hoc networks is performed in a distributed fashion where each node acts as host and router, such that it forwards incoming packets for others without relying on a dedicated router. Nodes are mostly resource constraint and the users are usually inclined to conserve their resources and exhibit selfish behaviour by not contributing in the routing process. The trust and reputation models have been proposed to motivate selfish nodes for cooperation in the packet forwarding process. Nodes having bad trust or reputation are detected and secluded from the network, eventually. However, due to the lack of proper identity management and use of non-persistent identities in ad hoc networks, malicious nodes can pose various threats to these methods. For example, a malicious node can discard the bad reputed identity and enter into the system with another identity afresh, called whitewashing. Similarly, a malicious node may create more than one identity, called Sybil attack, for self-promotion, defame other nodes, and broadcast fake recommendations in the network. These identity-based attacks disrupt the overall detection of the reputation systems. In this paper, we propose a reputation-based scheme that detects selfish nodes and deters identity attacks. We address the issue in such a way that, for normal selfish nodes, it will become no longer advantageous to carry out a whitewash. Sybil attackers are also discouraged (i.e., on a single battery, they may create fewer identities). We design and analyse our rationale via game theory and evaluate our proposed reputation system using NS-2 simulator. The results obtained from the simulation demonstrate that our proposed technique considerably diminishes the throughput and utility of selfish nodes with a single identity and selfish nodes with multiple identities when compared to the benchmark scheme.

• Journal of Contemporary Eastern Asia
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• 제11권2호
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• pp.47-60
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• 2012

Sino-Japanese relations suffered a great setback during the premiership of Koizumi $Jun'ichir{\bar{o}}$ (2001-2006). Although many factors, such as dispute over the resources of the East China Sea or Japan's anxiety about China's growing military expenditures, are accountable for this situation, it was Koizumi's visits to the Yasukuni Shrine that became a symbol of the controversies between the two countries. The Yasukuni issue triggered a real eruption of profound anti-Japanese feelings among the Chinese people. While commentators in China accused Koizumi of glorifying militarism and whitewashing the atrocities committed by Japanese soldiers during the Second World War, the Japanese public started perceiving China's "exaggerated" reaction as a convenient diplomatic tool used by China to apply pressure on Japan in other bilateral disputes. On the one hand, spontaneous protests against Koizumi's visits to the Yasukuni Shrine constituted a great constraint in China's diplomacy towards Japan, but on the other, they also became an ideal pretext for adopting a tougher stance in Chinese foreign policy. In this paper, I examine different points of view on the Yasukuni issue. After describing the Japanese background of the visits to the controversial shrine, I analyze various interpretations of China's reaction to the problem. Although emotions dominated discourse on the Yasukuni issue both in Japan and China, some pragmatic attempts to use this problem can still be seen. Besides being a side-effect of Koizumi's strong personality, the Yasukuni issue could be used either as a tool of factional struggle in the Chinese Communist Party (CCP) or as an instrument of Chinese foreign policy towards Japan.

• 비교문화연구
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• 제40권
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• pp.111-131
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• 2015

본 논문은 <공각기동대>의 주인공인 사이보그 여전사 쿠사나기 소령에 초점을 맞춰, 포스트휴머니즘과 퀴어이론의 시각에서 <공각기동대>를 재해석하는 것을 목적으로 한다. 기존비평에서 쿠사나기 소령의 몸이 여성해방의 상징으로 극찬 받거나, 아니면 그 성적 함의로 인해 여성성의 상품화란 비난을 받았다면, 포스트휴머니즘과 퀴어 이론은 인간/비인간, 남성(성)/여성(성)이란 이분법을 넘어 소령의 몸을 보다 급진적으로 해석할 여지를 준다. 즉, 이분법의 해체를 통해 이미지에 함몰된 현실 속에서 과연 현실이라는 것이 얼마나 "현실적"이며, 현실 속의 다양한 대립범주들이 얼마나 인위적인 것인지 재고해 보게 해주는 것이다. 이러한 해석의 틀로 본다면, 쿠사나기 소령의 몸은 현실 속 여성상의 "반영"이라기보다 그 자체로 존재의의를 지닌 아니메 속 허구 존재, 인간/비인간, 여성/남성의 범주에 속하는 대신 SNS와 정보화사회 속에 점점 내면을 잃어가는 현대인의 불안을 구현해주는 혼종적 존재이다. 많은 포스트휴머니즘 이론가과 퀴어 이론가들이 경고하듯, "포스트휴먼"이나 "퀴어"란 용어는 너무도 종종 인간중심적 사고를 재확인하기 위해 대중문화텍스트에서 남용된다. 이런 점을 염두에 두며, 본 논문은 소령의 혼종적 몸이 인간과 기계의 결합이기에 의미 있는 몸이라고 단순하게 주장하거나, 혹은 피상적인 포스트모던 읽기를 통해 경계를 넘나드는 해방적 몸이라고 미화하지 않을 것이다. <공각기동대>가 거두고 있는 성취는, 소령의 몸 속에 어지럽게 구현되고 있는 개인성, 동물성, 그리고 기술의 결합이 인간이 "언제나, 항상" 포스트휴먼적 존재였음을 깨닫게 해주는 것이다. 본 논문은 <공각기동대>가 유려한 영상을 통해 그려내는 이러한 인식의 전환, 즉 억압적인 인간중심 휴머니즘에서 퀴어한 존재들과의 공존이라는 인식의 전환이 윤리적 함의를 지녔음을, 그리고 이러한 윤리적 시도가 바로 이 영화의 가장 핵심적인 성취이자 지속적인 매력임을 주장하려 한다.