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SASA: Source Address Spoofing Avoidance Mechanism under High Movement for Mega-Constellations

IEEE International Conference on Communications (ICC)(2022)CCF C

Tsinghua Univ

Cited 0|Views26
Abstract
The emergence of mega-constellations is the most promising satellite network trend in recent years, which brings new security challenges to the network layer and higher layers, such as DDoS, worm, and DNS pollution. Source address validation is one of the effective solutions in terrestrial networks, by filtering the invalid address and resisting the source address spoofing. Because of the time-vary topology in mega-constellations, the source address validation mechanism faces the severe problem of the anchor mobility, which leads to a sharp decline in SAVI (Source Address Validation Improvements) performance and increases the cost to maintain the user status. In this paper, we develop a source address spoofing avoidance mechanism under high movement (SASA) for mega-constellations. Specifically, we propose that the user and the satellite both maintain the user status. After the satellite signed the binding information by the private key, it forms the mapping between the authenticity of the user address and the initial access satellite on the user side. Moreover, when the handover occurs, the user safely transmits the authentication information to the new access satellite through asymmetric encryption to complete rebinding. Simulation results show that SASA can greatly reduce the rebinding cost of mega-constellations by 95.04% in Starlink and 81.84% in Kuiper.
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Key words
network layer,terrestrial networks,invalid address,mega-constellations,SAVI performance,Source Address Validation Improvements,user status,SASA,user address,satellite network trend,private key,source address spoofing avoidance mechanism under high movement,asymmetric encryption
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要点】:本文提出了一种针对大规模星座的高移动性源地址欺骗避免机制(SASA),解决了大规模星座中源地址验证机制面临的时间变化拓扑和锚定移动性问题,提高了SAVI性能并降低了用户状态维护成本。

方法】:SASA机制中,用户和卫星都维护用户状态,卫星使用私钥签署绑定信息,在用户端形成用户地址真实性与初始接入卫星之间的映射;切换时,用户通过非对称加密安全地向新接入卫星传输认证信息以完成重新绑定。

实验】:实验结果显示,在Starlink和Kuiper数据集上,SASA能分别将大规模星座的重绑定成本降低95.04%和81.84%。