Accidents will happen and in our pursuit for secure systems, while increasing and creating ever more secure systems, we can also minimize the risks. One strategy we like is having a cascade of passwords. Never a single password - perhaps OK in a single network or environment, but never in a hostile public environment. For example: Level 1 password: only for physically accessible systems Level 2 password: for highly trusted networks like Google, Yahoo Level 3 password: for semi-trusted systems Level 4 password: for low trusted system (you trust their services but not sure if their systems are 100% secure) Level 5 password: no trust or perhaps you will use them only once As individuals we all need to create our own system for passwords which we like magicians, we should never share with the world.