Collected research

History theft with CSS Boolean algebra

Michal Zalewski · Michal Zalewski · 22 June 2014

Explores how color quantization and layered CSS can form Boolean logic and combine visited-link states in an interactive history-disclosure demonstration. Discusses browser restrictions and practical limits. Static copies preserve the explanation and code; interactive CSS displays remain on the source page.

Record

Researcher

Michal Zalewski

Published by

Michal Zalewski

Date

22 June 2014

Topic

Other

In the archive

• Collected in the 2014 research round

Related sources

• Boolean algebra with CSS (when you can only set colors)

Tags

• css
• browser-history
• side-channel

This page is the archive's own catalogue record. The research is the work of Michal Zalewski, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 15 September 2026.