| 摘要 |
A PIN is securely recorded on one face of a card (6) by encoding each digit of the PIN in an array (1, 2, 3, 4) of images of different human faces. Instead of memorizing a sequence of four digits, the PIN holder memorizes four faces. Each array of images is formed in a regular manner, for example as a grid, so that each element of each array can be assigned a number from 1 to 9 or from 0 to 9 respectively. The arrays are set out in a defined sequence. The set of four arrays serves as an aide memoire: the user can easily learn to recognise the four key faces, pick them out of the different grids, and by their position and sequence reconstruct the PIN, and then interpret them to a data terminal by means of a keypad (A). |
