Three questions to ask in every design review:

Siddharth Saxena

AppSec Engineer @ Moneyleaf | OWASP, threat modeling, bug bounty | Making security developer-friendly

6 Oct 2026 System Design Deep Dives

Three questions to ask in every design review: 1. What happens if this input is malicious? 2. Who can call this, and how do we know? 3. What's the blast radius if this component is compromised? Takes 10 minutes and catches a lot.

8 reactions2 comments

Comments

RM
Rohan Malhotra6 Oct 2026
Adding these to our review checklist.
KB
Karan Bhatia6 Oct 2026
Blast radius thinking is the most useful one in cloud design too.

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