Simon Willison’s Weblog

The Beauty Of The Diffie-Hellman Protocol. Some useful explanations here. Diffie-Hellman is used by OpenID to establish a shared secret between the provider and the consumer.

Posted 1st March 2007 at 10:08 pm

Recent articles

My review of Claude's new Code Interpreter, released under a very confusing name - 9th September 2025
Recreating the Apollo AI adoption rate chart with GPT-5, Python and Pyodide - 9th September 2025
GPT-5 Thinking in ChatGPT (aka Research Goblin) is shockingly good at search - 6th September 2025

cryptography 22 diffiehellman 1 openid 213 reddit 28

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe