A method to search for affinities between subjects comprises
the passages of effecting a step of registering a user with a
certification authority (14), effecting a step of receiving first
information relating to the user and memorizing the first
information in a portable electronic device (11) of the user,
and effecting a step of synthesizing the first information
memorized in the portable electronic device (11) by means of
transmission to a user interface (13) which processes the first
information memorized. The method also comprises the passages
of effecting a step of encrypting the first information
and memorizing the first information encrypted in the portable
electronic device (11), effecting a step of disseminating
the first encrypted information to other portable electronic
devices (11) in geographical proximity, effecting a step of
collecting second encrypted information relating to other
users, sent from other portable electronic devices (11) in
geographical proximity and effecting a step of decrypting the
first and second information encrypted at the certification
authority (14). Finally, the method provides to effect a step of
processing and analyzing the first and second decrypted
information, in order to identify affinities between them, at
the certification authority (14), and to effect a step of notifying
the affinities, by means of the certification authority (14).
