We use the smallest number of cookies a website can reasonably work with. There are no advertising, analytics, profiling or social-media tracking cookies on this site, and nothing is shared with third parties.
The cookies we set
| Name | Purpose | Lifetime |
|---|---|---|
du_session | Keeps a visitor's form session and the security token that protects the contact form against automated abuse. Also keeps editors signed in to the admin area. | Until the browser is closed |
du_remember | Set only for editors who tick "Keep me signed in". Never set for ordinary readers. | 30 days |
Both are strictly necessary cookies, so no consent banner is required. You can delete them at any time through your browser settings; the only consequence is that the contact form will ask you to reload before sending.
Content from other services
Some library pages embed videos from YouTube or Vimeo. We use YouTube's privacy-enhanced mode (youtube-nocookie.com), which does not set tracking cookies unless you actually play the video. Fonts and icons are loaded from Google Fonts and a public code mirror; these services receive your IP address as part of any ordinary web request. If you play an embedded video, that provider's own privacy policy applies to it.
Last updated 11 Oct 2026