Dev Tools · 1h ago
Python File Encryption Tool: Lessons from a Developer's Bugs
A cybersecurity enthusiast built a command-line file encryption tool in Python using the cryptography library's Fernet module. The tool generates secure keys, encrypts any file type, and keeps keys out of Git. The developer shares three bugs encountered: a circular import, an inverted if/else that would overwrite keys, and forgetting that return exits a function.
Meridian48 take
The bugs are basic but the article offers a useful reminder that even simple security tools require careful logic to avoid silent data loss.
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## Building a File Encryption Tool in Python: What I Learned From My Own Bugs →
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