Top all-time · #13512
Harrison's Sandbox
Personal blog · harrisonsand.comsecurityhardware
Harrison's Sandbox is a personal blog at harrisonsand.com about security and hardware. Since 2018, 5 different Hacker News readers have linked it 10 times. It is still writing: the last post was on 2025-12-08, and you can follow it by feed.
Too few sampled comments (1) to say how often HN recommends it.?
Why HN links it
Linked in a thread on RF spectrum mapping, the blog covers radio and cellular security, including passive IMSI catchers that intercept phone identifiers at base stations. The comment cites it as support for a point.
Summarised by Claude from a sample of 1 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
Do you mean a phone wouldn't broadcast an IMSI, without a base station nearby? It sounds like passive IMSI catching is possible though - https://harrisonsand.com/posts/imsi-catcher/ at least when a phone connects to a base station.
Comment linking /posts/imsi-catcher/
on “RF Spectrum Mapping”Submitted ISP Spying as a story · 251 points
HN discussionSubmitted Looking at GSM security 30 years later as a story · 142 points
HN discussionSubmitted Building a Passive IMSI Catcher as a story · 131 points
HN discussionSubmitted Reverse Engineering an EV Charger as a story · 44 points
HN discussionSubmitted Part 2 – Looking at GSM 30 years later as a story · 11 points
HN discussionSubmitted Reverse engineering digital Covid-19 certificates as a story · 4 points
HN discussionSubmitted Rooting IoT with patched ADB as a story · 3 points
HN discussionSubmitted Wardriving for Autonomous Vehicle Communications as a story · 3 points
HN discussionSubmitted Building a Passive IMSI-Catcher as a story · 2 points
HN discussion