Schneier on Security

I CAN put my cash card into an ATM anywhere in the world and take out a fistful of local currency, while the corresponding amount is debited from my bank account at home. I don’t even think twice: regardless of the country, I trust that the system will work.

The whole world runs on trust. We trust that people on the street won’t rob us, that the bank we deposited money in last month returns it this month, that the justice system punishes the guilty and exonerates the innocent. We trust the food we buy won’t poison us, and the people we let in to fix our boiler won’t murder us…