Abstract: Various aspects of the present system provide methods and systems for identifying an individual who operates a remote computer. One aspect provides a technique to generate fingerprint of computer and its user based on the information collected through the actions a user conducts on internet. Another aspect of the system provides a technique to compute the fingerprints and find relations between users and computers. Another aspect of the system provides a trust ranking to a user based on the consistency of information collected from the user's various actions.

Abstract: Various aspects of the present system provide methods and systems for authenticating online purchase by tracing internet actions to a remote computer and to an individual who operates the computer. One aspect provides a technique to generate fingerprint of computer and its user based on the information collected through the actions a user conducts on internet. Another aspect of the system provides a technique to compute the fingerprints and find relations between users and computers. Another aspect of the system provides a trust ranking to a user based on the consistency of information collected from the user's various actions.

Abstract: Systems and methods are disclosed to detect fraud by analyzing customer purchasing behavior for a high value item intentionally placed next to commonly purchased items, payment information for an address verification system (AVS), customer behavioral information, password sharing between two accounts, unique identification for a hardware component of a client computer used to purchase items on line, administrative information associated with a customer account; and Internet Protocol (IP) address.