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Communication encryption method and device for GSM (global system for mobile communications) mobile phones

A technology for encrypting calls and encrypting devices, applied in the fields of information technology and communication, can solve the problems of privacy and security threats of mobile users' calls, and achieve good communication security and implementation convenience, communication security guarantee, and resistance to resistance. The effect of crack strength

Inactive Publication Date: 2015-09-30
3525 SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This poses a great threat to the privacy and security of mobile user calls

Method used

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  • Communication encryption method and device for GSM (global system for mobile communications) mobile phones
  • Communication encryption method and device for GSM (global system for mobile communications) mobile phones
  • Communication encryption method and device for GSM (global system for mobile communications) mobile phones

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Embodiment Construction

[0054] The present invention will be further described in detail below with reference to the drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners are given, but the protection scope of the present invention is not limited to the following embodiments.

[0055] figure 1 Is the flow chart of the encryption method of the present invention, combined with figure 1 The steps to describe the encryption method include:

[0056] Such as figure 1 As shown in 101: the encrypted call is first initiated by the caller's normal call. After the voice service connection between the two parties is established, the process of requesting the establishment of an encrypted channel is entered; the voice service has established a connection determination, and the mobile phone receives the GSM network connection response signaling ( connect acknowledge) as the basis.

[0057] Such as figure 1 As shown in 102: in the pr...

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Abstract

The invention discloses a communication encryption method and device for GSM (global system for mobile communications) mobile phones. The method comprises steps as follows: an encryption communication is initialized by a communication call from a calling party to a called party, and after establishment of voice service connection of the two parties, an encryption channel establishment request process is performed; in the encryption communication process, the calling party sends a local voice signal to the called party in an encrypted manner, decrypts a received encrypted voice signal of the called party and reduces the signal to a plaintext voice signal; in the encryption communication process, the called party sends a local voice signal to the calling part in an encrypted manner, decrypts a received encrypted voice signal of the calling party and reduces the signal to a plaintext voice signal. The implementation method ensures that a public key is not transmitted during encryption communication processing and has good communication safety and implementation convenience.

Description

Technical field [0001] The present invention relates to the field of information technology and communication technology, in particular to a method and an encryption device for implementing encrypted calls of GSM mobile phones. Background technique [0002] The security mechanism of the current mobile communication system is designed on the assumption that the mobile core network is safe and reliable. The GSM system can use 64-bit encryption protection in the wireless channel, and its voice is directly transmitted in plaintext on the ground link. According to the literature description, Biryukov and Shamir improved J.Golic’s GSM A5 / 1 attack method. The key can be obtained in less than one second by analyzing the output of the A5 / 1 algorithm in the first two minutes of the call. Kc, its requirements for hardware are: 128 megabytes of memory, 73G hard disk. It can be seen that the cracking and eavesdropping of the GSM encryption method is completely feasible and threatening. And...

Claims

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Application Information

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IPC IPC(8): H04W12/02
CPCH04W12/02
Inventor 魏中锋
Owner 3525 SCI & TECH BEIJING
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