Matrix Pattern Authentication (MPA) using a divided authentication code

摘要

The invention relates to a method of processing an authentication code (e.g. memorable identification pattern (MIP)) of a user (U), comprises the steps of: obtaining an authentication code of a user, the authentication code comprising a plurality of unique elements, dividing the authentication code into at least two authentication segments each forming a subset of the elements of the authentication code; encoding (e.g. using a one-way hash (SHA-2))) each of the authentication segments so that the authentication segments cannot be retrieved from the encoded authentication segments; and storing the encoded authentication segments for use in a validation in at least one record of a database, wherein the encoded authentication segments are stored in different and independent records in the database. The method also includes generating candidate identification patterns corresponding to at least one portion of a challenge code (OTC). The authentication segments may be chained. The segments may overlap partially and may have different lengths.