Encryption and decryption accessory for communication terminal

Abstract

The invention provides an encryption and decryption accessory for a communication terminal, belonging to the field of communication devices. The accessory is characterized by consisting of a central processing unit (MCU), a network modulation and demodulation unit, a speech processing unit, an encryption and decryption unit and an audio interface. Speech information can be digitized, encoded and compressed; the compressed information is encrypted and then the encrypted information is modulated by the network modulation and demodulation unit; network information which is obtained by a speech communication device can be demodulated by the network modulation and demodulation unit; the demodulated information is decrypted, and then the decrypted information is decompressed into speech. The accessory at least comprises an interface for data transmission. The accessory is suitable for various communication terminals, such as analogue interphones, radio stations, mobile phones, telephones, satellite telephones and the like. The accessory can be provided with structures such as the corresponding network modulation and demodulation unit and the like according to different network communication transmission requirements so as to realize encrypted transmission of the speech information.

Description

technical field [0001] The invention belongs to the field of communication equipment, in particular to communication terminal accessories with encryption and decryption functions. Background technique [0002] Today, communication networks pervade every corner of the world, literally becoming the "nervous system" of society. Every moment, countless political, military, economic, technological, cultural, life and other information in human society are transmitted between various communication terminals. The popularity of communication terminals has directly become the benchmark of the country's informatization level. It is precisely because of the explosive development of information technology that social efficiency has increased to an unprecedented level. However, people are often intoxicated by the huge benefits brought by information technology and ignore its potential harm. The struggle between the safe transmission of information and the theft of information runs thro...

AI Technical Summary

Problems solved by technology

[0004] Nowadays, the number of communication terminals is huge, and the method of scrapping current products to purchase new products will cause a great waste of social resources

Especially for some large institutions and units, the unified replacement of new equipment requires a huge amount of funds, which leads to the fact that when new technologies and new products are actually applied to the market, they are often no longer new technologies and new products.

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