Encryption and decryption device and method, and communication terminal equipment

Abstract

The invention provides an encryption and decryption device applied to a communication terminal. The encryption and decryption device comprises an application processor comprising a core module, and an encryption and decryption module, wherein the core module is suitable for transmitting communication data received by the communication terminal, the communication data comprises conversation data, the encryption and decryption module is connected with the core module and is suitable for carrying out encryption or decryption for the communication data received from the core module. The invention further provides an encryption and decryption method applied to the encryption and decryption device. The invention further provides communication terminal equipment. The communication terminal equipment comprises any encryption and decryption device and a switch device used for opening or closing the encryption and decryption device. Through the encryption and decryption device and the encryption and decryption method, unauthorized persons are effectively prevented from acquiring communication content of two communication parties, and thereby safety of the conversation content and the short message content can be obviously improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to an encryption and decryption device, an encryption and decryption method, and a communication terminal device. Background technique [0002] Communication includes services such as calls, text messages, images, etc., and each communication service needs to be protected by encryption to prevent unauthorized persons from intercepting or eavesdropping in all links of communication. Practice has proved that encryption is a feasible and effective means to protect information security, and the cryptographic system is the technical basis for realizing information security and confidentiality. Specifically, encryption uses a special algorithm to change the original information data, so that even if an unauthorized person obtains the encrypted information, they still cannot understand the content of the information because they do not know the decryption method. [0003] In the prior ar...

AI Technical Summary

Problems solved by technology

Specifically, encryption is to change the original information data with a special algorithm, so that even if the unauthorized person obtains the encrypted information, he still cannot understand the content of the information because he does not know the decryption method.

[0003] In the prior art, the call and SMS data in the communication terminal are transmitted without encryption processing, which will have a very large information security risk, and it is very easy to be intercepted or eavesdropped by unauthorized persons

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