Unmanned Aerial Vehicles (UAVs) are integral in various sectors like
agriculture, surveillance, and logistics, driven by advancements in 5G.
However, existing research lacks a comprehensive approach addressing both data
freshness and security concerns. In this paper, we address the intricate
challenges of data freshness, and security, especially in the context of
eavesdropping and jamming in modern UAV networks. Our framework incorporates
exponential AoI metrics and emphasizes secrecy rate to tackle eavesdropping and
jamming threats. We introduce a transformer-enhanced Deep Reinforcement
Learning (DRL) approach to optimize task offloading processes. Comparative
analysis with existing algorithms showcases the superiority of our scheme,
indicating its promising advancements in UAV network management.

本研究论文讨论了无人机网络数据新鲜度和安全性的挑战，引入了基于变换增强深度强化学习方法的框架以解决窃听和干扰问题，并通过与现有算法的对比分析展示了其在无人机网络管理方面的优越性和前景。

保障天空：具有 AoI 感知的 IRS 辅助安全多无人机系统和高效任务卸载

Securing the Skies: An IRS-Assisted AoI-Aware Secure Multi-UAV System  with Efficient Task Offloading

To improve national security, government agencies have long been committed to
enforcing powerful surveillance measures on suspicious individuals or
communications. In this paper, we consider a wireless legitimate surveillance
system, where a full-duplex multi-antenna legitimate monitor aims to eavesdrop
on a dubious communication link between a suspicious pair via proactive
jamming. Assuming that the legitimate monitor can successfully overhear the
suspicious information only when its achievable data rate is no smaller than
that of the suspicious receiver, the key objective is to maximize the
eavesdropping non-outage probability by joint design of the jamming power,
receive and transmit beamformers at the legitimate monitor. Depending on the
number of receive/transmit antennas implemented, i.e., single-input
single-output, single-input multiple-output, multiple-input single-output and
multiple-input multiple-output (MIMO), four different scenarios are
investigated. For each scenario, the optimal jamming power is derived in
closed-form and efficient algorithms are obtained for the optimal
transmit/receive beamforming vectors. Moreover, low-complexity suboptimal
beamforming schemes are proposed for the MIMO case. Our analytical findings
demonstrate that by exploiting multiple antennas at the legitimate monitor, the
eavesdropping non-outage probability can be significantly improved compared to
the single antenna case. In addition, the proposed suboptimal transmit
zero-forcing scheme yields similar performance as the optimal scheme.

提出一种基于无线的合法监视系统，利用多天线监视器通过积极干扰来窃听嫌疑人之间可疑通信链路的信息，以优化数据传输速率和防止信息中断的概率，同时，基于接收和发送波束成形器，通过设计处理多输入和多输出情况的最优干扰功率，实现监视系统的高效性。

多天线无线合法监视系统：设计与性能分析

Multi-antenna Wireless Legitimate Surveillance Systems: Design and  Performance Analysis

The impossibility of perfectly copying (or cloning) an arbitrary quantum
state is one of the basic rules governing the physics of quantum systems. The
processes that perform the optimal approximate cloning have been found in many
cases. These "quantum cloning machines" are important tools for studying a wide
variety of tasks, e.g. state estimation and eavesdropping on quantum
cryptography. This paper provides a comprehensive review of quantum cloning
machines (both for discrete-dimensional and for continuous-variable quantum
systems); in addition, it presents the role of cloning in quantum cryptography,
the link between optimal cloning and light amplification via stimulated
emission, and the experimental demonstrations of optimal quantum cloning.

对量子克隆机进行了全面回顾，阐述了量子克隆在量子密码学中的作用、最优克隆与刺激发射光放大之间的联系及其实验演示。

量子克隆

Quantum cloning

We consider an N -> M quantum cloning transformation acting on pure two-level
states lying on the equator of the Bloch sphere. An upper bound for its
fidelity is presented, by establishing a connection between optimal phase
covariant cloning and phase estimation. We give the explicit form of a cloning
transformation that achieves the bound for the case N=1, M=2, and find a link
between this case and optimal eavesdropping in the quantum cryptographic scheme
BB84.

研究了作用于布洛赫球的纯二能级态的 N 到 M 量子克隆变换，通过建立最优相位协变克隆和相位估计之间的联系，提出了其保真度的上界。找到了在 N=1，M=2 情况下实现上界的克隆变换的明确形式，并发现了该情况与 BB84 量子密码方案中最优窃听之间的联系。