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The linked article is about using the HackRF One, a software-defined radio (SDR) device, to perform replay attacks on JavaScript-based systems. The article explains how an attacker can capture and replay network traffic to bypass authentication or other security measures. It provides a step-by-step guide on setting up the HackRF One, capturing network traffic, and replaying the traffic to demonstrate the vulnerability. The article highlights the importance of implementing robust security measures, such as using encryption and digital signatures, to mitigate the risk of replay attacks in JavaScript-based applications.