METHOD AND APPARATUS FOR CONTROLLING ACCESS BASED ON KEY IN SOCIAL NETWORK SERVICE

摘要

The present invention discloses a method and an apparatus for controlling access based on a key in a social network service. The present invention relates to the method for controlling access based on the key in the social network service by the access control apparatus comprising the steps of: (a) separating a unique master key of a file owner and generating one core key and a plurality of sub-keys wherein each of the sub-keys is differently allocated for each of plural groups classified according to a reliability level and a relation; (b) when key distribution is requested by a file requester, determining a group to which the file requester is affiliated by using at least one among a friend list of the file requester, a reliability level between the file requester and the file owner, and a friend list of the file owner and distributing a sub-key corresponding to the determined group to the file requester; and (c) when a file is requested by the file requester, determining whether access to the file of the file owner is allowed by using the sub-key distributed to the file requester and the core key.