| 摘要 |
A computer implemented method and system is provided for confirming viewing of multimedia content on a client device. A challenge generator generates a challenge stream comprising multiple challenges, random in content. The challenge stream and the multimedia content stream are integrated in real time to generate a challenge in real time. The challenge is random in content and new each time the same multimedia content is played on one or more client devices. The challenge is presented to a viewer at random times during and/or after play of the multimedia content, and/or presented at random physical locations on the multimedia content, by overlaying the challenge on the multimedia content. A response for the presented challenge is invoked from the viewer, based on which a response report is generated. The viewer is credited with an item of value, if the response report confirms that the viewer viewed the multimedia content.
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