Method and device for encrypting short messages

Abstract

The invention relates to the technical field of communication and particularly relates to a method and a device for encrypting short messages. According to the method and the device, on the premise of ensuring the safety of the short message transmission, the complexity of a short message encryption algorithm is reduced. The method comprises the following steps: generating a first symmetric encryption key by a short message transmitting device; encrypting a to-be-transmitted short message by adopting the first symmetric encryption key; encrypting the first symmetric encryption key to generate a second symmetric encryption key; transmitting a second short message and the second symmetric encryption key to a short message receiving device; and enabling the short message receiving device to decrypt the second short message based on the second symmetric encryption key to acquire a first short message. The realization process of the method is simpler, so that the complexity of the encryption process of short messages interacted between the short message transmitting device and the short message receiving device is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a short message encryption method and device. Background technique [0002] At present, all mobile communication terminals support sending and receiving short messages. The short message platform is a service provided by the public mobile network. Because the short message has the advantages of convenient sending and receiving and low tariff, it has been widely used by the majority of users. A common method of communication on the move. With the continuous emergence of new services in the communication field, in some services, short messages are also used to transmit some management configuration information or transmit service system notification messages. [0003] For example: in the visual voice mail service, the voice mail sending device can send a short message to the user terminal to notify the user that the status of the voice message or greeting in the voice mail b...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, in many service systems, the service sending device interacts with the corresponding service short message receiving device through short messages, that is to say, under certain circumstances, the service short message receiving device will also send some information The message mode interacts with the service sending device, (this kind of short message is different from the short message transmitted between the user and the user is a system short message,) in practical applications, before transmitting each service short message, if the usual security mechanism, then the communication service sending device and the service short message receiving device need to negotiate the algorithm and key information required for encryption in real time, and the encryption process is more complicated

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