Access Control Method Based on Key Management Suitable for Pay TV System

Abstract

The invention discloses an access control method based on key management suitable for a pay television system. All users of the same video website form a group, and then these users are divided into different user subsets according to user preferences. The users in the subset subscribe to the same TV program. The website administrator encrypts the TV program and the session key, and sends the ciphertext of the program and the ciphertext of the session key to the cloud server and the corresponding user respectively. The cloud server updates the data storage table according to the data uploaded by the website administrator, and judges whether the user's request is legal according to the data storage table. Only legitimate users can obtain the session key and the ciphertext of the TV program at the same time, and further obtain the plaintext of the TV program through decryption. The invention can ensure that the user's privacy data will not be stolen, supports the dynamic operation of the TV program by the user and the service provider, and saves the calculation and communication expenses of the user and the service provider.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an access control method based on key management suitable for a pay television system. Background technique [0002] With the development of wireless technology and the popularization of smart devices, pay TV is quickly accepted by the public as a new business model. As one of the most common service models in the pay TV system, subscription-based services can support users to subscribe to any number of TV programs, and at the same time allow service providers (such as video website managers) to charge users a certain amount based on the services provided. Fees, in order to achieve the effect of users obtaining services and service parties making profits. In order to protect the interests of the service provider and the user's private data (such as religious beliefs, hobbies, etc.), the content subscribed by the user must not be transmitted on the channel in plain text. The s...

AI Technical Summary

Problems solved by technology

The access control scheme based on the key tree structure can flexibly support the dynamic subscription behavior of service providers and users, but each user's behavior changes will cause an average of O(logn) keys to be updated, giving users and service providers Brings huge overhead; the access control scheme based on key agreement technology is superior to the access control scheme based on the key tree structure in terms of communication overhead, but it cannot support all subscription behaviors well

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