Simon Willison’s Weblog

Is there anyway to game unique link verifications? Like when you get sent a link of the form https:/........com/UID=TYYN04001 How would one change the digits to reproduce another working link?

21st November 2013

My answer to Is there anyway to game unique link verifications? Like when you get sent a link of the form https:/........com/UID=TYYN04001 How would one change the digits to reproduce another working link? on Quora

Not if they’ve been implemented correctly.

Posted 21st November 2013 at 10:33 am · Follow me on Mastodon, Bluesky, Twitter or subscribe to my newsletter

More recent articles

I vibe coded my dream macOS presentation app - 25th February 2026
Writing about Agentic Engineering Patterns - 23rd February 2026
Adding TILs, releases, museums, tools and research to my blog - 20th February 2026

This is Is there anyway to game unique link verifications? Like when you get sent a link of the form https:/........com/UID=TYYN04001 How would one change the digits to reproduce another working link? by Simon Willison, posted on 21st November 2013.

email 35 security 577 quora 1005

Next: If a startup has raised 10M, how much is it worth?

Previous: How could GitHub improve the password security of its users?

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