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

What happens if AI labs train for pelicans riding bicycles? - 13th November 2025
Reverse engineering Codex CLI to get GPT-5-Codex-Mini to draw me a pelican - 9th November 2025
Video + notes on upgrading a Datasette plugin for the latest 1.0 alpha, with help from uv and OpenAI Codex CLI - 6th November 2025

cryptography 23 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