Duress

Black Unicorn unicorn at schloss.li
Sun Mar 3 16:18:38 PST 1996


On Sun, 3 Mar 1996, David K. Merriman wrote:

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> >As a side remark, every burglar alarm connected to a phone that I've ever seen
> >has this feature: a code that one can type under duress that will both turn
> >off the alarm and call for help. I wonder how many users will remember this
> >code when under duress.
> >
> 
> Many (if not most) alarm companies make the duress code the *reverse* of the normal code.

This might backfire in the case of self-destructing data.

If the attacker backs up the data, and enters the duress code, the real 
code is easy to guess the second time around.

> 
> Dave Merriman
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> 

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