Cookie notice

Every cookie OurDIU sets, what it’s for and how long it lasts. None are used for ads.

Last updated 1 October 2026

Needed to sign in

Without these you can still browse and download, but not sign in.

CookieWhat it’s forLasts
better-auth.session_token
Keeps you signed in. Only set when you sign in. On the live site its name starts with __Secure-.7 days, renewed while you use the site
better-auth.state
Protects signing in with Google from forged requests. Also starts with __Secure- on the live site.5 minutes, while you sign in
  • better-auth.session_token

    Keeps you signed in. Only set when you sign in. On the live site its name starts with __Secure-.

    Lasts: 7 days, renewed while you use the site

  • better-auth.state

    Protects signing in with Google from forged requests. Also starts with __Secure- on the live site.

    Lasts: 5 minutes, while you sign in

Preferences and view counts

These are set by OurDIU itself and never leave it. Deleting them resets your choices.

CookieWhat it’s forLasts
ourdiu_theme
Remembers light or dark mode, if you pick one.1 year
qb_department
Remembers the department you last filtered questions by, so the list opens on it.1 year
qb_views_qqb_views_s
Count your view of a question or paper once a day. They only hold page numbers and times.24 hours
  • ourdiu_theme

    Remembers light or dark mode, if you pick one.

    Lasts: 1 year

  • qb_department

    Remembers the department you last filtered questions by, so the list opens on it.

    Lasts: 1 year

  • qb_views_qqb_views_s

    Count your view of a question or paper once a day. They only hold page numbers and times.

    Lasts: 24 hours

Analytics

Set by Google Analytics, which reports usage to Google. They are not used for ads. To stop them, block cookies for the site or use Google’s opt-out add-on.

CookieWhat it’s forLasts
_ga_ga_QPKSEMRTZ2
Google Analytics: tell visits apart, so I can see how many people use the site and which pages help.Up to 2 years
  • _ga_ga_QPKSEMRTZ2

    Google Analytics: tell visits apart, so I can see how many people use the site and which pages help.

    Lasts: Up to 2 years

Controlling cookies

Your browser can show, block and delete cookies. Blocking the sign-in cookies stops you from signing in; the rest of the site keeps working. See the privacy policy for how your data is used.