A mobile terminal file encryption and decryption system and method based on 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, and relates to the technical field of information security. The file encryption and decryption method is applied to the file encryption and decryption system, and the system includes: the underlying support framework of the operating system for the hardware encryption TF card, the hardware encryption TF card monitoring system service, application layer registration, and the hardware encryption TF card system; the method described Including: hardware encryption TF card 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 encryption TF card as parameters, AES encryption is performed using the true random number generated in the hardware encryption TF card as the key to generate hardware Encrypted TF card root key, this root key is the key bound with the mobile device, responsible for encrypting and decrypting the file header information of the mobile terminal. The file encryption and decryption method and system provided by the embodiments of the present invention effectively guarantee information security and protect user data and privacy from being leaked.

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