公开(公告)号：US20180157808A1

公开(公告)日：2018-06-07

申请号：US15887310

申请日：2018-02-02

Applicant: LINE Corporation ,  LINE Plus Corporation

Inventor： SangHun JEON ,  Dongpil SEO ,  Sungbeom AHN ,  Kwang-Hee HAN ,  Wang Jin OH ,  Seong Yeol LIM

IPC: G06F21/14 ,  G06F21/12 ,  G06F21/64 ,  G06F8/41

CPC classification number: G06F21/14 ,  G06F8/41 ,  G06F21/12 ,  G06F21/125 ,  G06F21/62 ,  G06F21/64

Abstract: Provided is a method and system for code obfuscation of an application. A method configured as a computer may include receiving an application program package that includes an intermediate language (IL) code generated by compiling code for an application including a plurality of classes and a plurality of methods as a dex file over a network, selecting a protection target class or a protection target method from among the plurality of classes and the plurality of methods, encrypting the selected protection target class or the selected protection target method by retrieving and encrypting an IL code corresponding to the selected protection target class or the selected protection target method from the dex file, and adding decryption information for decrypting the encrypted protection target class or the encrypted protection target method to a secure module that is further included in the application program package.

公开(公告)号：US20210390198A1

公开(公告)日：2021-12-16

申请号：US17333575

申请日：2021-05-28

Applicant: LINE Plus Corporation

Inventor： Sang Min CHUNG ,  Seol hwa HAN ,  SangHun JEON

IPC: G06F21/62 ,  G06F8/61

Abstract: A file protection method of a computer apparatus including a processor, the method including extracting classes from an executable file of a package file, classifying the classes into class groups, adding a loading code to a first class group among the class groups, the loading code configured to cause sequential loading of the class groups to a memory in a random loading order in response to execution of the package file, adding an integrity code to a second class group among the class groups, the integrity code configured to verify an integrity of a corresponding class group among the class groups or a previous class group among the class groups, the previous class group including the loading code configured to cause the corresponding class group to load, and regenerating the package file using the class groups after the adding the loading code and the adding the integrity code.

公开(公告)号：US20210374231A1

公开(公告)日：2021-12-02

申请号：US17329663

申请日：2021-05-25

Applicant: LINE Plus Corporation

Inventor： Sang Min CHUNG ,  Joontae CHOI ,  SangHun JEON

IPC: G06F21/52 ,  G06F21/56 ,  H04L29/06

Abstract: Disclosed is a hooking detection method and system that may specify position information of a function referenced by an executable module from an outside or provided to the outside or a unique value of an executable code, and may determine application programming interface (API) hooking based on a classification acquired by comparing unique values or by clustering the unique values.