EEVblog #762 – How Secure Are Electronic Safe Locks?


How secure are electronic locks used on safes?
Dave tries a power line analysis attack on a standard La Gard (LG) 3740/3750 Basic electronic digital lock on a CMI home safe.
Can you crack an electronic digital safe lock with just a resistor and an oscilloscope?
All sorts of safe cracking techniques are discussed – thermal camera imaging, bumping, drilling, and spiking the solenoid.
And naturally there is a complete teardown of the La Gard lock and a demonstration on how it works.
And then Dave does something incredibly dumb, and has to fix it the old fashioned way, Hollywood style.
It’s a tail of epic fails and stunning wins.

Forum HERE

Brochure
ST ST62T25 OTP Microcontroller
AT93C46 EEPROM

Teardown photos:

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