Cyber-crime is not an old sort of crime of the world. It is defined as any criminal activity which takes place on or over the medium of computers or internet or other technology recognised by the information technology act. Cyber-crime is the most prevalent crime playing a devastating role in modern India. Not only the criminals causing enormous losses to the society and the government but are also able to conceal their identity to a great extent. There are number of illegal activities which are committed over the internet by technically skilled criminals. Taking a wider interpretation, it can be said that, cyber crime includes any illegal activity where computer or internet is either a tool or target or both. This book examines the psychology of cyber-crime. It aims to be useful to both undergraduate and postgraduate students from a wide variety of disciplines, including criminology, psychology and information technology.