Xiaochen Zou

Xiaochen Zou, who publishes as Eten (ETenal) and signs his work with the Chinese name 笑尘, is a Linux kernel security researcher turned founder. He earned a PhD in cybersecurity at UC Riverside under Zhiyun Qian, building automated tools that discovered dozens of kernel vulnerabilities, then worked as a security researcher at Microsoft before co-founding Nebula Security (YC S26), an AI-native cybersecurity company where he serves as CEO. Nebula pairs elite human hackers with an autonomous agent, VEGA, that finds bugs, writes proofs of concept, and proposes patches.