A method, system and device for realizing watermark function on cam

Abstract

The invention discloses a method for implementing a watermark function on a CAM. The method includes: a host acquires and loads an HbbTV application; starts the CAM application in the CAM, and waits for the HbbTV application in the host to connect; the CAM application receives the HbbTV application connection After the request, perform handshake authentication with the HbbTV application to establish a secure data channel; if the secure data channel establishment fails, the CAM application stops descrambling the protected content; if the secure data channel is successfully established, the CAM application passes the established secure data channel. Communicate with the HbbTV application, safely transmit the watermark information to the host, and the HbbTV application presents the watermark information. By adopting the HbbTV technology and establishing a secure data channel between the CAM application and the HbbTV application, the present invention ensures data security, and at the same time enables quick and simple deployment and high compatibility. Moreover, operators can directly use the current CAS system to securely transmit the watermark information to the terminal without increasing the network bandwidth and reducing the transmission delay.

Description

technical field [0001] The invention belongs to the technical field of watermark processing, and in particular relates to a method, system and device for realizing a watermark function on a CAM. Background technique [0002] The current watermarking method on CAM (Conditional Access Module, conditional access module) cannot achieve acceptable results in terms of security, cost and time period at the same time, and is not easy to use. The current watermarking methods include: [0003] Adopt MHEG-5 technology: MHEG-5 technology is no longer mandatory to be supported by the host, and the application can be closed by the user or the host, which cannot be well guaranteed in terms of security. [0004] Adopting a private protocol: On the one hand, this solution requires investment in maintenance certificates, and on the other hand, the host and the CAM manufacturer need to invest in resources to implement the private protocol at the same time. The implementation cost is relatively...

AI Technical Summary

Problems solved by technology

[0004] Adopting a private protocol: On the one hand, this solution needs to invest in cost maintenance certificates, on the other hand, the host and the CAM manufacturer need to invest resources to implement the private protocol at the same time, the implementation cost is high, and it is not easy to achieve compatibility between hosts from different manufacturers

[0005] Adopt CI+ standard watermark scheme: This scheme currently only supports display fingerprints, and only at the protocol level. According to the development law of the industry, in order to achieve large-scale use, host manufacturers still need to invest a lot of cost in development, and finally achieve mass production, which is still unpredictable

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