Yuki Hung is currently a cyber security researcher at CyCraft Technology and holds a master's degree from National Tsing Hua University. His research focuses on dark web intelligence analysis and the application of deep learning models in cyber security. He has also conducted visiting research at Japan's National Institute of Information and Communications Technology (NICT). His research has been presented at ACSAC Workshop, hack.lu, HITCON, and PyCon. He is currently a co-author of https://sectools.tw.
In today's digital environment, organizations often fail to detect in real-time when their data is leaked and sold online. Our goal is to shorten the time gap between the exposure of data on the internet and its detection by the public, thereby minimizing the duration in which sensitive corporate data remains exposed. The dark web serves as a primary marketplace for trading personal information and can be accessed securely through browsers like Tor browser. This paper focuses on web crawling of dark web sites. Utilizing data collected from these sites, we trained a BERT classification model to categorize transaction posts into five different types of data breaches. This enables rapid identification of the type of leak each post pertains to. Finally, we employ a Retrieval-Augmented Generation (RAG) approach to gain insights from the dark web.
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