A mobile terminal file encryption and decryption system and method based on a hardware encryption TF card

Abstract

The invention provides a mobile terminal file encryption and decryption system and method based on a hardware encryption TF card, which relate to the technical field of information security. The fileencryption and decryption method is applied to a file encryption and decryption system. The system comprises: an operating system bottom support framework for a hardware encrypted TF card, a hardwareencrypted TF card monitoring system service, an application layer registration, and a hardware encrypted TF card system. The method comprises: the hardware encryption TF card is configured to encryptthe device according to the device DevID of the mobile terminal, the IMEI of the SIM card, the SN of the memory chip and the SN of the hardware encrypted TF card are used as parameters, and the true random number generated in the hardware encrypted TF card is used as a key to carry out AES encryption to generate a hardware encrypted TF card root key, which is a key bound with the mobile device andis responsible for encrypting and decrypting the file header information of the mobile terminal. The file encryption and decryption method and system provided by the embodiment of the invention effectively guarantee the information security, and ensure that user data and privacy are not disclosed.

Description

technical field [0001] The invention relates to the technical field of information security, in particular, a mobile terminal file encryption and decryption system and method based on a hardware encryption TF card is designed. Background technique [0002] With the popularity of mobile terminal devices (mobile phones, tablets, etc.), their functions have become more and more abundant, and people have paid more and more attention to content security and sensitivity. Smart terminals store a variety of personal privacy information. Mobile terminals use an open mobile operating system, which can easily be implanted with malicious codes such as Trojan horses and viruses to steal users' personal information, posing a great challenge to security. [0003] At present, most mobile terminals on the market do not use hardware encryption chips for data protection, and mainly use pure software applications to encrypt and decrypt some files. The usual implementation method is: set a secu...

AI Technical Summary

Problems solved by technology

But there are two major problems in this method: (1) the performance problem of encryption / decryption, software encryption / decryption takes up more CPU performance of terminal equipment

(2) Security issues. At present, the encryption software on the market often only has one layer of confidentiality, and the encryption key is relatively fixed, so there are still many security risks

[0004] In case of high encryption requirements, software encryption methods cannot meet the requirements

The disclosed patent CN103559453A related to hardware encryption TF card also utilizes the DevID of the mobile terminal device, the IMEI of the SIM card, and the SN of the storage chip as parameters for generating the encryption key, but the encryption / decryption of the generated files is done through a fixed Undisclosed formula generation, which can be cracked once leaked

Images