19th January 2008 - Link Blog
Yahoo! OpenIDs are the same for all RPs. I had assumed that Yahoo! would be using directed identity to provide a different OpenID for each user/site combination, to prevent correlation of accounts. I was incorrect; they’re just using it for easier sign-in, with the same auto-generated URL used for every site.
Recent articles
- Some thoughts on the Navier–Stokes Millennium Prize Problem - 8th September 2026
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- OpenAI's rogue agents were caught communicating via public wikis - 4th September 2026