A reminder terminal apparatus and authentication method are disclosed. An example authentication method includes creating a table having letter strings contained in elements respectively, where the letter strings are created at random. The method also includes creating a registration letter string using the table and registering or newly registering the registration letter string as a password for a user name of the user at a resource server. The example method further includes prompting the user to use the access terminal to extract second elements from the table in accordance with the selection sequence, arrange second letter strings contained in the extracted second elements to obtain an authentication letter string, and apply the obtained authentication letter string as a password for requesting a utilization of a resource of the resource server under the user name.