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Key generation and encryption and decryption method and device and SIM card chip

A key generation and key technology, which is applied in the field of communication, can solve problems such as inability to meet data security storage requirements, and achieve the effect of improving security and increasing constraints

Pending Publication Date: 2021-03-26
BEIJING TONGFANG MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, only relying on password encryption cannot meet the needs of data security storage

Method used

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  • Key generation and encryption and decryption method and device and SIM card chip
  • Key generation and encryption and decryption method and device and SIM card chip
  • Key generation and encryption and decryption method and device and SIM card chip

Examples

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Comparison scheme
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Embodiment Construction

[0057] The key generation and encryption and decryption methods provided in the embodiments of this application can be applied to such as figure 1 the scene shown.

[0058] exist figure 1 In the shown scenario, the mobile terminal may include a smart phone or other smart electronic devices. An encryption and decryption application program (ie APP) runs on the mobile terminal, and the APP can be used to realize the interaction between the mobile terminal and the user, and can also realize the encryption and decryption process of data. Meanwhile, a SIM card and a memory card can be installed in the mobile terminal. Wherein, the memory card can be an expandable large-capacity memory such as an SD card, and the memory card is provided with a storage space with a certain storage capacity, which can be used to store data generated when the user operates the mobile terminal. The SIM card is provided with a key generating device, which can be used to generate a key.

[0059] Among...

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PUM

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Abstract

According to the secret key generation and encryption and decryption method provided by the invention, the password, the IMEI or the CGI input by the user is encrypted based on the authentication secret key of the SIM card to obtain the secret key. And in the encryption and decryption process, the APP performs encryption and decryption operation on the data by using the key. Based on this, the CGI, the IMEI and the authentication key which are consistent with those during encryption must be obtained during decryption of the APP, and in addition, a password consistent with that during encryption also needs to be obtained. In conclusion, the key generation method provided by the embodiment of the invention can confirm the geographic position of the mobile terminal accessed to the mobile communication network through the CGI, confirm the mobile terminal equipment through the IMEI, confirm the current SIM card information through the authentication key, and further confirm the security ofthe password through the password input by the user. Therefore, the security of the secret key is greatly improved. Furthermore, according to the encryption and decryption method provided by the embodiment of the invention, the secret key is used for encryption and decryption, constraint conditions for correctly decrypting the ciphertext are increased, and the security of data storage is improved.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a key generation and encryption and decryption method, device and SIM card chip. Background technique [0002] With the development of smart electronic devices and mobile communication technologies, users can use the increasingly rich functions of smart electronic devices for daily communication, entertainment or office activities. Taking smart phones as an example, smart phone users can not only use mobile phones for communication, but also perform entertainment activities such as watching or downloading audio and video on smart electronic devices, and more and more users rely on smart phones for office work and payment. and authentication activities. However, the operations performed by users on smartphones will generate a large amount of data, which may include some sensitive information. These data will be stored in the mobile phone's own storage space o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/33H04W12/041H04W12/06
CPCH04W12/06
Inventor 康博
Owner BEIJING TONGFANG MICROELECTRONICS