Electronic versions of apostilles created in real time are used to enhance video, audio and text data streams generated by a transmitting device prior to their transmission over a computer or TV broadcast network to a receiving device. Unlike ordinary apostilles which do not verify the contents of documents being attested, the contents of the electronic apostilles that have been designed are based on the real time video, audio and text content as well as the media access control address data of the transmitting device. The electronic apostille streams which are stored at the transmitting end as they are generated in real time can be compared against the apostille streams at the receiving end to establish if any of the video, audio and text data have been modified.
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