Method and system for file transparent encryption and decryption of Android platform

Abstract

The invention discloses a method for file transparent encryption and decryption of the Android platform. The method includes the steps: selecting a route of a folder where a file needed to be protected is positioned, and setting passwords; respectively generating an encrypted route dictionary list and an authentication file according to the route and the passwords input by a user; scanning the encrypted route dictionary list, if an operating system is started for the first time, subjecting the protected file to first-time initialization encryption according to list items, and then carrying out the next step; when the user triggers a screen unlocking event, receiving a passphrase input by the user, comparing the passphrase subjected to hash algorithm with the authentication file generated at the step two, and if the passphrase is not matched with the authentication file, judging that unlocking fails; if the passphrase is matched with the authentication file, subjecting the passphrase to sha 1 algorithm to generate a secret key, and storing the secret key; calling the secret key for encryption and decryption of the file. The invention further discloses a system for file transparent encryption and decryption of the Android platform. File protection is realized on the premise of small interferences to user operations.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a file transparent encryption and decryption system and method for an Android platform. Background technique [0002] With the rapid development of the information age, the Internet continues to penetrate into all aspects of people's lives and work, becoming an indispensable part. With the popularization of computer applications and the development of the Internet and mobile storage devices, the previous paper documents are gradually transformed into electronic documents. Electronic documents have many advantages such as small size and convenient viewing. Seriously affected the security of electronic file storage and communication. [0003] Transparent encryption technology is a file encryption technology that has developed rapidly in recent years. The so-called transparency means that for authorized users, the encryption and decryption process is automatically com...

AI Technical Summary

Problems solved by technology

These file protection systems frequently require users to enter passwords and choose to encrypt and decrypt files, which reduces the convenience of the device

On the other hand, the existing transparent encryption and decryption system reduces the impact on user operating habits, but the protection work is not comprehensive: for example, due to permission issues, it cannot protect a specific directory, and cannot protect files on the SD card (while the official user data of the SD card important storage location); or it can only protect files in a specified format; or it is vulnerable to system integration; or it has low compatibility and scalability, for example, it can only support some specific versions of the system

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