| 摘要 |
<p>The identity of an end-user operating a computer (44, 50) is confirmed by analyzing user reactions to aberrations in output. More specifically, an aberration is caused in output that the computer (44, 50) provides to an output device (54), and the end-user's response to the aberration is received, an end-user characteristic is extracted from the response and compared stored characteristic responses to find a match. A match is indicative of the identity of the computer user. It can also be checked whether, after causing an aberration in output the end-user responded differently to the output than if the output did not have the aberration. The lack of a different response can be interpreted as indicative that the end-user is a bot.</p> |
