| 摘要 |
<p>A method for authenticating a user of a computerised system comprises computing an array or grid 100 of elements 102, presenting the array to the user, receiving user input comprising elements corresponding to pre-determined positions 104, 106 within the array, comparing the user input against a known value and authenticating a user if there is a match. The number of unique elements in the array is less than the total number of elements (so that at least one element is repeated). The user input will form a one-time password (OTP), and the pre-determined position (defined by a memorable identification pattern) is not received by the authentication device. A static PIN or password may also be input by a user. The elements may be numbers (digits), letters, symbols, other characters, shapes or colours. The number of unique elements may be greater than four; each element may be represented at least twice and distributed substantially evenly amongst the array.</p> |
