Abstract: Disclosed is a method for enabling the input of a secret at an electronic device. The method includes establishing a plurality of primary identifiers and a plurality of secondary identifiers; associating each secondary identifier with a corresponding primary identifier by use of a mapping function; on a display configured such that it is only viewable by a single user displaying the plurality of primary identifiers and the plurality of secondary identifiers, with each secondary identifier being associated with a corresponding primary identifier; receiving one or more inputs from the user indicating a secondary identifier, translating each input secondary identifier using the mapping function to its corresponding primary identifier to generate one or more primary identifiers and using the generated primary identifiers as an input to an authentication function where the authentication function allows access to private data or functionality associated with an electronic device.