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.

Brief

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}

Simulated request stream
No network calls performed — visual only.
300 ms
Requests/sec
0.00
Total requests
0
Sim mode
visual-only
[Simulation log — simulated URLs shown; no real requests are sent]

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.

If a page runs ~3 requests/sec per client, then 100 simultaneous clients create ~300 requests/sec — a rate that can quickly overwhelm modest hosting. Use rate limits and WAF rules to protect endpoints.

Embedded evidence

The videos above show independent walkthroughs and analyses published by community participants; consult the primary threads below for full context. :contentReference[oaicite:7]{index=7}

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