Random location authentication

An authentication string, such as a password, consists of characters. Each of the characters in the authentication string is randomly associated with a defined location on a device. For example, an area on a touch screen can be associated with a character in the authentication string. When a user selects a location associated with the character, feedback is provided that identifies the character. When the user selects a location that is not associated with the character, feedback is provided that does not identify the character. If the user responds by indicating that the associated location matches the character, the character is authenticated. If the user responds by indicating that a location not associated with the character is a match, the character is not authenticated. This process is then repeated for each character in the authentication string.