Simon Willison’s Weblog

Crowdvine, iCalico, Pathable, a Study in Collusion. Stitching sites together around a single user database using subdomains and simple signed cookies.

Posted 12th July 2007 at 11:09 pm

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

collusion 1 crowdvine 1 foocamp 3 icalico 1 kellan-elliott-mccrea 19 pathable 1 signedcookies 5 sso 3

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