Hu Liyazhou, Wang Wei, Pan Yuanyuan, Liu Tianhe, Li Yajie, Zhao Yongli, Li Jianqing
Opt Express. 2024 Feb 26;32(5):7254-7275. doi: 10.1364/OE.511055.
Elastic optical network (EON) is a critical transmission infrastructure for emerging new applications due to its spectral efficiency and flexibility. Nowadays, numerous confidential lightpaths (CLPs) are carried over EON to support security-sensitive users. However, they are vulnerable to crosstalk attacks at the optical layer, typically aimed at eavesdropping on the carried data or even disrupting connections. Due to the transparent nature of the optical signals, such attacks are difficult to detect and could last for a long time, resulting in data leakage even spreading throughout the network. This paper presents a novel routing and spectrum allocation (RSA) algorithm to protect CLPs from crosstalk attacks. We investigate intra-channel and inter-channel crosstalk attacks and develop a metric to quantify crosstalk leakage risks (CLRs). We first formulate an ILP model to plan CLPs with a minimum CLR. To solve the same problem for large-scale networks, we also propose a heuristic algorithm, i.e., crosstalk-attack-aware RSA. Results indicate that the proposed algorithm is capable of reducing CLR by 23%.
弹性光网络（EON）由于其频谱效率和灵活性，是新兴新应用的关键传输基础设施。如今，众多机密光通路（CLP）通过EON承载，以支持对安全敏感的用户。然而，它们在光层容易受到串扰攻击，通常旨在窃听承载的数据甚至中断连接。由于光信号的透明性质，此类攻击难以检测且可能持续很长时间，导致数据泄露甚至在整个网络中传播。本文提出一种新颖的路由与频谱分配（RSA）算法，以保护CLP免受串扰攻击。我们研究了通道内和通道间的串扰攻击，并开发了一种度量来量化串扰泄漏风险（CLR）。我们首先制定一个整数线性规划（ILP）模型，以规划具有最小CLR的CLP。为了解决大规模网络的相同问题，我们还提出了一种启发式算法，即串扰攻击感知RSA。结果表明，所提出的算法能够将CLR降低23%。
