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2 posts
- 01September 18, 2026 · 3 min read
The Weakest Link in Your System: The MD5 Fallacy and Secure Password Hashing
Storing passwords in plain text or with MD5 in your database is a massive mistake. To prevent password cracking that takes seconds with rainbow tables, we have to accept that speed is a vulnerability.
- 02September 15, 2026 · 2 min read
How database indexes work: from full table scan to B-Tree
Why does searching for a single email in a table with a million rows take 4 seconds? Full table scan, B-Tree, and a 2000x speedup with a single-line `CREATE INDEX`—plus the classic mistakes that silently disable your index.
