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published on 2023-02-18 00:00:00 UTC by Didier Stevens
Content:

I had a locksmith make a duplicate key of my mailbox lock, and it didn’t work (didn’t open the lock).

The cutting looked good, I saw no difference with the original key.

Until I noticed this notch:

Turns out this notch accepts this tiny “bump” on the cylinder:

This notch was missing on the duplicate. I milled a notch and now the duplicate key opens the lock:

Article: Quickpost: Fixing A Duplicate Key - published almost 2 years ago.

https://blog.didierstevens.com/2023/02/18/quickpost-fixing-a-duplicate-key/
Published: 2023 02 18 00:00:00
Received: 2023 02 18 00:20:37
Feed: Didier Stevens
Source: Didier Stevens
Category: Cyber Security
Topic: Cyber Security
Views: 0