Archive.today Allegations — Technical Walkthrough & Safe Simulation
Simulation: Repeated Request Attack — New Visual Design
Safe, visual reproduction of the reported archive.today CAPTCHA pattern and step-by-step explanation. All claims are presented as reported and linked below.
What was reported
The investigator published a code snippet allegedly present on the archive.today CAPTCHA page that used a repeating timer to perform requests every ~300ms to a blog’s search URL, with randomized query strings preventing cache reuse. The primary writeup and community threads are linked in Sources. :contentReference[oaicite:5]{index=5}
The example observed by the investigator showed a `setInterval(..., 300)` pattern with a randomized query string; see source link in the Sources section. :contentReference[oaicite:6]{index=6}
Technical explanation (plain language)
- A short timer-based loop in JavaScript (`setInterval`) can execute repeatedly while a page is open.
- If the loop builds unique URLs on each tick (for example by appending a random token), common caches cannot reuse responses.
- Each unique request forces the origin server to do work (search, database queries, render), multiplying server load as more clients run the loop simultaneously.
Embedded evidence
Sources & primary materials
- Gyrovague — investigator’s detailed post (code snippet, screenshots, correspondence). :contentReference[oaicite:8]{index=8}
- Hacker News discussion — thread analyzing behavior and verification. :contentReference[oaicite:9]{index=9}
- Reddit /r/DataHoarder — community thread with logs and commentary. :contentReference[oaicite:10]{index=10}
- Public paste: redacted correspondence (linked from the investigator’s post)
- Lobsters thread (community link)
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