A method and system for processing encrypted stream in broadcast network

Abstract

The invention discloses a method and a system for processing the encrypted streams in a broadcast network. The system comprises: a first key managing module and a first datagram processing module in a sender and a key managing module and a second datagram processing module in a receiver. The method comprises the steps that: the first key managing module generates a key and sends the key to the second key managing module; the second key managing module receives and saves the key; the first datagram processing module uses the key to encrypt the datagram and sends the datagram to the second datagram processing module and attaches a specific field containing the key information to the datagram after being encrypted; the second datagram processing module receives the datagram after being encrypted and searches for the key in the second key managing module according to the information of the key in the specific field of the datagram; after the key is found, the second datagram processing module uses the key to decrypt the datagram. The application of the method and the system of the invention saves the storage space of the receiver and ensures the integrity of the data transmission.

Description

technical field [0001] The invention relates to a broadcast network system, in particular to a method and system for processing encrypted streams in a broadcast network. Background technique [0002] In the broadcast network system, for the sake of security, the data transmitted on the broadcast network is usually an encrypted stream to prevent the data from being intercepted during transmission. For data with a higher confidentiality level, the method of encrypting by message is usually used, that is to say, one or more messages usually use a key. In this case, the client of the network usually receives the ciphertext Key is required to receive. In a broadcast network system that uses a key in one or more messages, when a message arrives earlier than the key corresponding to the message, the system usually does this: cache the currently received message or discard it. Received message. However, this method has the following disadvantages: firstly, if the message is buffe...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: first, if the message is cached, the overhead of storage space at the receiving end will be increased; second, if the received message is discarded, the data content may be incomplete

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