As enterprises entrust their most critical data and AI workloads to cloud infrastructure, the question of who is responsible for keeping that data safe has never been more consequential. On July 28, TiDB answered that question publicly, releasing a security whitepaper that maps the architecture, responsibilities, and safeguards governing its cloud database service running on Alibaba Cloud. The document reflects a maturing philosophy in enterprise software: that security is not a layer applied after the fact, but a foundation laid at the very beginning — and that showing your work openly is its