Key management-based access control method suitable for pay television system

Abstract

The invention discloses a key management-based access control method suitable for a pay television system, which comprises the following steps of: forming a group by all users of the same video website, dividing the users into different user subsets according to the preferences of the users, wherein television programs subscribed by the users in the same user subset are the same. And the website manager encrypts the television 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. And the cloud server updates the data storage table according to the data uploaded by the website manager and judges whether the request of the user is legal or not according to the data storage table.Only legal users can obtain the session key and the ciphertext of the television program at the same time, and the plaintext of the television program is further obtained through decryption. According to the invention, the privacy data of the user can be ensured not to be stolen, and the dynamic operation of the user and the service provider on the television program is supported; and computing and communication overheads of the user and the service provider are saved.

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 TV 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 service p...

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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