ChatGPT now knows what you do on other websites via ad collector

AI Digest

ChatGPT通过广告收集器追踪用户跨网站行为，将浏览数据与账户关联，引发隐私争议。

ChatGPT uses ad collectors to link user activities across websites to their account, raising privacy concerns.

Key points

• OpenAI通过Cookie和同步令牌实现跨站数据追踪 OpenAI uses cookies and sync tokens for cross-site tracking
• 收集数据包括搜索内容、购买行为和页面浏览信息 Collects search terms, purchases, and browsing behavior
• 隐私政策将__obi归类为分析Cookie但未明确告知用户 Privacy policy classifies __obi as analytics cookie
• iOS浏览器因安全机制无法接收该Cookie iOS browsers block third-party cookies via security features
• 机制与Meta早期做法相似但应用于AI产品属新现象 Mechanism mirrors Meta's approach but applied to AI products

Takeaway: AI平台通过广告技术实现跨平台用户画像，挑战传统隐私边界。 / AI platforms leverage ad tech for cross-platform profiling, challenging privacy norms.

Why it matters 揭示AI产品数据收集黑箱，对隐私保护实践具有警示价值。