OpenAI's ad collector uses a cookie called __obi to track ChatGPT users across the web, linking browsing activity on advertiser sites back to user accounts. The system works by generating a signed identifier on ChatGPT that persists as a cross-site cookie, which is then sent to OpenAI whenever users visit sites running OpenAI ad code, along with harvested data like emails, phone numbers, and browsing paths.
Device Bound Session Credentials (DBSC) is an experimental web standard implemented in ASP.NET Core that ties session cookies to a device's private key, preventing cookie replay attacks. When a stolen cookie is copied to another machine, it becomes useless for session refresh since only the original device can sign the cryptographic challenge. This significantly reduces the attack window from weeks to minutes by forcing short-lived cookies that require device-based proof to refresh.
A browser-based tool that converts cookies between Netscape cookies.txt and JSON formats (Cookie-Editor, Puppeteer, key-value, or raw headers), with an additional feature to check whether Claude session cookies are still active and display account plan and usage limits.
Marginalia Search is a website that complies with GDPR and the EU Cookie Directive by not collecting personal information and limiting cookie use to service functionality. Access logs with IP addresses are retained for 24 hours, while anonymized logs may be kept longer for debugging purposes.
Global e-commerce emerged not from encryption but from existing liability structures and pragmatic solutions like cookies and credit card tokenization. Physical credentials—premises, cards, IDs—were abandoned online, and identity verification was replaced by fraud modeling based on behavior and history rather than actual verification.
Effatà is a privacy-focused metasearch engine that aggregates results from Google, Bing, Yahoo, and other search engines without collecting personal data or using tracking. Users may encounter cookies or CAPTCHA requests from third-party search engines, which are managed independently of Effatà's privacy-first approach.