A computer-implemented method comprising:



obtaining, by way of an input, input data relating to speech provided by a user;
deriving one or more hypotheses for each of a plurality of user data fields from the input data;
obtaining one or more reference values for each of the plurality of user data fields for each of one or more candidate users;
calculating a score for at least one candidate user of the one or more candidate users, calculating the score comprising:

calculating a plurality of user data field scores comprising, for each of the plurality of user data fields, a respective user data field score using the one or more hypotheses and the one or more reference values for the candidate user for the respective user data field;
performing one or more fuzzy logic operations on the plurality of user data field scores;


using the score for a candidate user of the one or more candidate users to perform a verification or identification process for the user.