Information Security 101 - the Rules of Thumb

[ken]

> The chance of a secret being revealed is proportional to the square of 
> the number of people who can access it; 

Sounds plausible in a hand-wavingy sort of way. But if it is 
true its not

 > because the more
> possible suspects there are, the less each of them thinks they are 
> likely to think they will be caught.

so much as because the more people there are in a group the more 
potential interactions between them there are