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An encrypted interaction method between a sim card and a dedicated public telephone terminal and the dedicated public telephone terminal

An interactive method and public telephone technology, applied in the field of communication, can solve the problem of reducing the profit and income of mobile operators, and achieve the effect of preventing possibility and information leakage

Inactive Publication Date: 2012-02-01
XIAMEN STELCOM INFORMATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has caused some users to take out these SIM cards and use them in other environments, reducing the profit income of mobile operators

Method used

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  • An encrypted interaction method between a sim card and a dedicated public telephone terminal and the dedicated public telephone terminal
  • An encrypted interaction method between a sim card and a dedicated public telephone terminal and the dedicated public telephone terminal
  • An encrypted interaction method between a sim card and a dedicated public telephone terminal and the dedicated public telephone terminal

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Embodiment Construction

[0047] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0048] refer to figure 1 As shown, the embodiment of the present invention includes the following steps:

[0049] Step A1: SIM card A transmits a random number to device terminal B;

[0050] Step B1: The device terminal B responds and sends the IMSI of the SIM card A to the server platform C;

[0051] Step C1: server platform C responds and sends a key to device terminal B;

[0052] Step B2: Device terminal B responds and returns the key calculation result to SIM card A;

[0053] Step A2: SIM card A responds and allows or restricts usage after comparing the results.

[0054] The principle of encrypted interaction between SIM card A and device terminal B is: public phone SIM card A transmits a 20-byte random number (RND) to phone device terminal B through the GetInput command (GSM11.14 standard command). Mobile phone device terminal B uses the fi...

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Abstract

The invention relates to the field of communication, in particular to an encrypted interaction mode between a public phone SIM card and a public phone terminal, and proposes a dedicated public phone terminal for preventing the phenomenon of "slipping cards". The encryption interaction mode between the SIM card and the private public telephone terminal includes the following steps: the SIM card transmits a random number to the terminal; the terminal responds and sends the IMSI of the SIM card to the server platform; the server platform responds and sends a key to the terminal; the terminal responds And return the key calculation result to the SIM card; the SIM card responds and compares the results to allow or limit the use. The dedicated public telephone terminal at least includes: a SIM card interaction unit, a communication unit, a key storage unit, and a key decryption unit, capable of responding to the random number sent by the SIM card. The technical scheme of the invention discloses an encrypted interaction mode between a SIM card and a dedicated public telephone terminal, which overcomes the defect of using a card sticker to "cheat" an encrypted SIM card and put it on a common terminal for use.

Description

technical field [0001] The invention relates to the field of communication, in particular to an encrypted interaction mode between a public phone SIM card and a public phone terminal, and proposes a dedicated public phone terminal for preventing the phenomenon of "slipping cards". Background technique [0002] With the increasingly fierce competition in the mobile operation market, mobile operators have gradually moved from the original extensive market management method to the refined management method of segmented markets. For different users and different usage needs, mobile operators have developed different brands and products to conduct differentiated operations and competition. For example, in some low-end products, mobile operators currently sell products by bundling terminals with SIM cards. Compared with personal use products (such as GSM, M-Zone, Shenzhouxing, etc.), these products are different in use, so The tariff is relatively cheap, and the purchase of these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/06H04W8/18H04W88/02H04L9/00H04W12/04H04W12/40
Inventor 张联林小淞王琼陈可煌
Owner XIAMEN STELCOM INFORMATION & TECH
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