Rigorous AppSec
Insights and resources to build effective AppSec testing teams
Written by
Ryan Armstrong
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AppSec
Dec 14, 2025
•
6 min read
Some things are better not written down at all
Nov 28, 2025
12 min read
No one reads anymore
Aug 3, 2025
10 min read
AI All the Way Down
Apr 29, 2025
The only non-LLM AppSec newsletter with mostly LLM content.
Mar 15, 2025
11 min read
Not a hiatus, just busy.
Oct 9, 2024
Don't use mice models in security research.
Sep 15, 2024
18 min read
More of the same
Aug 1, 2024
The LLM Edition
Jul 17, 2024
The certified not vaporware appsec newsletter
