‘The assault’ examines surveillance and its effect on our behaviour. From wiretapping to the most sophisticated forms of electronic monitoring and DNA fingerprinting, the knowledge that our activities are or may be monitored undermines our psychological and emotional autonomy. What are the dangers of the misuse of personal information? In authoritarian countries, biometrics may be imposed on the public, and personal information can be used to commit fraud. The new technology has the capacity to undermine our liberty, but at the same time it is necessary for combating the threats to our liberty, such as terrorism and crime. The arguments for and against DNA databases and ID cards are examined.