Kaito AI co-founder Yu Hu addressed privacy concerns about Kaito Pulse, a browser extension launched August 18 that links public Polymarket and Hyperliquid positions and other off-platform activity to users' X posts. Kaito says Pulse adds Aura, a metric intended to measure attention when online commentary is supported by actual behavior. Users can build Aura by installing Pulse, using Yaps to claim an initial score, verifying trading or creator activity and, in earlier product details, referring other users. The launch followed Kaito's July 23 data agreement with X, which restored access to real-time social data. Analyst 0x_ultra's source-code review raised concerns that Pulse could fingerprint devices using GPU rendering, device-model information and audio tests; log X activity including scrolling, clicks, searches and bookmarks with heartbeat packets every 30 seconds; read ChatGPT and Claude subscription information; and access trading-account data such as balances, positions, profit and loss, and deposit and withdrawal records. The review described activity across 12 domains and a zkTLS component based on a branch of the open-source Primus project. Yu Hu said Pulse's zkTLS verification creates an encrypted proof only when a user actively initiates verification, with Kaito receiving the final proof rather than complete account data or browsing history. He said X interaction data, including content exposure, time spent and engagement, was authorized during installation and that Pulse does not send activity from other websites. He acknowledged that Chrome's permission notice allowing the extension to read and write data on all websites is broader than its actual use and said the next version will specify X websites. Critics including Ultra recognized the explanation. Kaito plans to open-source Pulse this week for community review, while Yu Hu said device fingerprinting is intended only to prevent abuse such as fake engagement, click fraud and Sybil attacks, or witch attacks, and not for analytics or other purposes.