Security systems for computer networks including a remote portable apparatus and coupling means; portable appliances in the form of a personal computer for interactive participation or not for clients in multimedia programmes and events and for dtmf telephone transmissions; electronic authentification apparatus for authentifying users during inputs, outputs and access, such as computer software, computing equipment, computer peripheral devices, coded magnetic cards and tokens; computer software for supplying authorisations to users for the securement of access, providing computer security and securement of data; contact imaging apparatus such as capacitive biometric scanners and optical biometric scanners to be used for representing parts of the human body such as digital fingerprints and palms; portable biometric imaging apparatus such as apparatus for wireless communications for imaging fingerprints and palms; fingerprint capacitive scanners with interface devices for wireless communication, fingerprint optical scanners with wireless communication interfaces; contact imaging apparatus including a processor for representing a part of the human body, processing images so as to identify a user from parts of images of the human body, and an interface for communication for providing an access code such as a password, a encryption key or a personal identification number with a hosting system; interfaces for chip cards and drives and cd-writers

Business management, computer file management, collection of data into computer databases, systematization of information into computer databases; sales promotion