Anti-repackaging method and system for application programs

An application program and repackaging technology, which is applied in the direction of program/content distribution protection, software maintenance/management, etc., can solve the problems of increasing the difficulty of reverse attack, lack of anti-repackaging detection and blocking mechanism, etc., and achieve the effect of reducing reverse tracking

Active Publication Date: 2021-07-30
INST OF SOFTWARE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the detection and blocking mechanism for anti-repackaging is still relatively lacking, and the difficulty of reverse attacks is mainly increased by packing or obfuscation

Method used

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  • Anti-repackaging method and system for application programs
  • Anti-repackaging method and system for application programs
  • Anti-repackaging method and system for application programs

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Embodiment Construction

[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0034] Taking the Android application as an example, in the specific implementation process, it is necessary to decompress the APK file first to obtain a dex file, and use the baksmali tool to convert the decompressed dex file into a smali file, and then modify the defense code in the smali file. After the defense code is inserted, the smali file is converted into a dex file, and then signed and compressed into an APK file to complete the protection of the entire application. The specific defense code composition and insertion method will be introduced in detail below.

[0035] 1. Composition of defense code

[0036] The defensive code consists of two modules: a repackaging program identification module and a repackaging program exception trigge...

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Abstract

The invention relates to an application program anti-repackaging method and system. This method firstly constructs defense codes that can identify repackaging programs and trigger exceptions; then implants defense codes into applications to defend against attacks through repackaging. The defensive code consists of two parts, including the identification of repackers and the exception triggering mechanism. In the actual process of implanting defensive codes, the protection of Android applications is achieved mainly by randomly placing them in multiple places and confusing them to increase the difficulty of reverse tracking by the attacker. The invention can effectively prevent attackers from repacking attacks on Android application programs and application programs of other operating systems.

Description

technical field [0001] The present invention relates to application program protection technology, in particular to an application program anti-repacking method and system, which are suitable for application programs of the Android system and other operating systems. [0002] technical background [0003] Application repackaging mainly refers to the technique of illegally implanting malicious codes, advertisement information, malicious links, etc. into applications, and republishing new programs to obtain profits illegally. This repackaging technology is currently widely used, especially with the popularity of mobile phone applications, repackaging technology is developing more rapidly. [0004] Currently, mobile phones are widely used, and users install various application software on their mobile phones for communication, entertainment, payment, etc., which greatly facilitates users' lives. Currently, Android phones account for 86.4%, and as of 2017, Android apps have been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/14G06F8/70
CPCG06F8/70G06F21/14
Inventor 张颖君
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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