Best of 2025

The blog posts Hacker News loved most in 2025. 459 posts.

Hardware & Electronics
18

Root shell on a credit card terminal

In this project, I started to reverse engineer payment card terminals because they seemed to be an interesting target for security research, given the high stakes involved. Although I initially didn’t know much about this industry, I did expect a ton of security features and a very security-hardened device. And to…