| 摘要 |
The present invention describes a method and system for securing a remote video transmission, the method comprising: - generating a marker digitally encoded in bits for an image acquired by a camera (111) of a video system, said encoded marker comprising an identifier of the camera (111) and a time variable; - inserting said encoded marker into the image taken by the camera (111) in order to create a secure image, said insertion being carried out by adding, for each bit of said encoded marker, a pattern to said image in the spatial domain, the conversion of said pattern into the spectral domain being a predefined submatrix of which at least one frequency coefficient encodes said bit of the encoded marker; - transmitting the remote secure image; - acquiring said remote secure image; - extracting said encoded marker from said secure image; - verifying the time variable by comparing with said time reference and the identifier of the camera in order to control the temporal freshness of the secure image and the origin of same; - indicating a failure if at least one of the items of information included in the encoded marker violates a predefined security criterion. |
