49results about How to "Prevent decompilation" patented technology

The invention provides a method for preventing an application program in an intelligent terminal android system from being decompiled. An encryption algorithm is introduced into the android system, as a result, a software program is prevented from being decompiled, and the security of android programs can be improved greatly.

The embodiment of the invention provides a method and a device for reinforcing an application program. The method comprises the following steps of receiving a reinforcing request of the application program, wherein the reinforcing request comprises an installation package of the application program and multi-channel information for reinforcing the application program, the installation package comprises code files and resource files, and release channel names and corresponding channel values are configured in the resource files; analyzing to obtain corresponding code files and resource files from the installation package of the application program; executing reinforcing operation on the code files obtained through analysis; executing retouching operation on the resource files obtained through analysis according to each piece of channel information to obtain a new resource file corresponding to each piece of channel information; executing packaging operation on the reinforced code files and the new resource file corresponding to each piece of channel information to obtain a reinforced installation package corresponding to each piece of channel information. According to the method and the device, the safety of the application program can be improved and the efficiency of reinforcing multiple release channels is improved.

The invention provides an installation file protection method and apparatus. The method comprises: analyzing an installation file package; modifying the analyzed installation file package, wherein the modification comprises: selecting and obtaining a character string constant in the analyzed installation file package, encrypting the selected and obtained character string constant to obtain an encrypted character string constant string, and replacing a corresponding character string constant with the encrypted character string constant string; and packing the modified installation file package to obtain a new installation file package. Through the installation file protection method and apparatus, an installation file can be prevented from being subjected to tampering, secondary packing and decompilation, so that the purpose of better protecting the installation file is achieved.

The invention is applicable to the technical field of computers, and provides a byte code encryption method, a byte code decryption method and a terminal, and the method comprises the steps: configuring a path of a target Java packet to which a to-be-encrypted target byte code belongs in a POM (Project Object Model) based on a preset attribute when detecting that an encrypted plug-in packet existsin the POM; Obtaining a target Java packet, and packaging the target Java packet to generate a jar packet; Determining an encryption environment corresponding to the target byte code according to thepacket information of the jar packet; Calling a dynamic library through the Java class library, and setting a preset parameter corresponding to the encryption environment for the target byte code; And encrypting the set target byte code by adopting an encryption algorithm corresponding to the preset parameter to generate an encrypted jar package. According to the scheme, different encryption algorithms are adopted to encrypt the byte codes in different encryption environments, the byte codes are not prone to being cracked by agents, the byte code files are effectively protected, decompilationis prevented, and therefore source codes are effectively protected.

The invention discloses a fax encryption device based on an intelligent encryption key and an implementation method of the fax encryption device, and relates to the field of encrypted fax communication. Hardware encrypted faxes are realized through a traditional PSTN (public switched telephone network), a custom command is added in the fax implementation process to realize the fax encryption method on the basis of the fax T.30 protocol, fax data encryption is organically integrated in the fax communication process, and the hidden danger of guard type secret leakage is eliminated. The adopted intelligent encryption key is approved and certificated by the State Encryption Administration, adopts the state commercial cryptographic algorithm and can effectively ensure the reliability and the high efficiency of the cryptographic algorithm; the device can automatically switch unencrypted and encrypted faxes, is higher in safety, working efficiency and compatibility and can be widely applied to various industries such as government agencies, military, finance, telecom, enterprises and the like as well as users.

The invention provides a method for guaranteeing the self-security of a JAVA program. GM algorithms SM2 and SM3 are used for signing a CLASS file of the JAVA, then a GM algorithm SM4 is used for encrypting the CLASS file, and the CLASS file is effectively prevented from being decompiled and tampered maliciously. The method can effectively protect the JAVA program, and the self-security is high. According to the encrypted CLASS file, a JAVA source program corresponding to the CLASS file can not be decompiled by any decompiling tools. For the signed CLASS file, any illegal change to the signed CLASS file can be timely found and is prevented from operating, attacks made by maliciously modifying codes are prevented, and the security level of the JAVA program is greatly improved.

The invention discloses a safety protection method of application programs and a server. The method comprises following steps: receiving a first application program sent from a client by the server; collecting parameters/instructions of the first application program by the server in order to obtain a second application program such that the second application program can normally operate and enable a reverse tool to exit by fault when the reverse tool is utilized for analyzing the second application program; and sending the second application program to the client by the server.

The invention discloses an APK file strengthening method. The APK file strengthening method comprises the steps that a source code of an APK file needing to be strengthened is divided into a first source code serving as a body part and a second source code serving as a core function part; the first source code and the second source code are coded into a first APK file and a second APK file respectively; the first APK file is decompressed, and a first classes.dex file in the first APK file is extracted; encryption processing is conducted on the second APK file, and statistics is conducted on the file length information of the encrypted second APK file; the encrypted second APK file and the file length information of the second APK file are added to the tail part of the first classes.dex file; file head information in the first classes.dex file is recalculated and updated, the first APK file is signed through a signing tool provided in an Android SDK, and the strengthened APK file is obtained. By means of the APK file strengthening method, decompilation of an existing Android reverse tool can be avoided, the difficulty of decompilation is increased, and thus the safety of the APK file can be improved to a great degree.

The invention discloses a method for protecting software distribution security by applying strong symmetric encryption. The method is characterized by comprising the following steps of: 1, generatingan encryption and decryption key based on a system timestamp by utilizing a pseudo random number generation algorithm; 2, compiling and integrating the encryption and decryption key, an encryption anddecryption algorithm function, a dynamic random number and an identity verification algorithm into an encryption and decryption dynamic library in a C language form; 3, automatically generating a secret key according to the step 1, and encrypting a software package by using the generated secret key; and 4, sequentially calling the identity verification algorithm and the encryption and decryptionalgorithm function of the encryption and decryption dynamic library to verify a software installer. Thus, decompilation is high in difficulty, an encryption and decryption module realizes multiple protection measures such as encryption, verification, confusion and the like, and the effect of preventing an application from being decompiled and illegally authorized to the greatest extent is achieved.

The invention discloses Java code confusion and recovery methods and apparatuses. The Java code confusion method comprises the steps of defining a confusion rule, and storing the confusion rule in a confusion rule file; according to the confusion rule, confusing Java class files to obtain confused Java class files; and packaging the confused Java class files and the confusion rule file into a JARfile. By defining the confusion rule, which Java class files need to be confused is flexibly configured; in addition, the confused Java class files realize detail confusion, so that the confused Javaclass files are prevented from being decompiled; and the confused Java class files still meet Java class file format standards, so that the confused Java class files can participate in compilation anderrors during operation of other third-party frameworks and class libraries which a Java program depends on are not caused.

The invention relates to a method and device for preventing decompilation of executable files, computer equipment and a medium. The method for preventing decompilation of the executable file comprisesthe steps that a node acquires an encrypted first executable file and file information of the first executable file; the node obtains a secret key used for decrypting the first executable file from the first server according to the file information and the user information of the node; and the node decrypts the first executable file by using the key, and loads the second executable file obtainedby decryption into the memory. Through the method and the device, the technical problem of source code leakage in related technologies is solved, and the safety of the source code is improved.

The invention relates to a system for preventing a java program from being decompiled, which comprises a preset DAlvik instruction set, a processor and a memory in which a computer program is stored; when the computer program is executed by the processor, the method includes: A1: acquiring all target code segments from java byte codes to be processed; A2, converting each target code segment into a corresponding target dex byte code; A3, converting each target dex byte code into a target instruction set and data corresponding to each target instruction based on a preset DAlvik instruction set, and generating a first executable file; A4, dynamically generating a target interpreter in the SO file based on a conversion relationship between all the target dex byte codes and data corresponding to each target instruction in the target instruction set; A5, emptying all target code segments in the to-be-processed java byte codes, adding corresponding association marks to obtain pre-processed java byte codes, and converting the pre-processed java byte codes into a reinforced dex file. According to the method and the device, the java program can be prevented from being decompiled, and the security of the java program is improved.

The invention relates to the technical field of information security, and provides a source code reinforcement method and device, computer equipment and a storage medium. The source code security can be comprehensively improved. The method comprises the steps that after an initial source code is obtained, a server IP record process code and a server IP confirmation process code are inserted into the initial source code to obtain a second-generation source code, then the second-generation source code is subjected to code modularization to obtain a plurality of code function modules, each code function module is divided into a plurality of module fragments, and each recombined code function module is obtained based on a plurality of module fragments of each code function module, wherein each recombined code function module is composed of a plurality of module fragments after position adjustment, and function link codes are inserted among the plurality of module fragments after position adjustment; third-generation source codes are obtained according to the recombined code function modules, and compilation is carried out after code obfuscation is carried out on the third-generation source codes.

The invention discloses a mobile terminal?payment password?transmission system and a method, and relates to the field of mobile payment. The payment password?transmission system comprises a mobile payment?module,?a payment platform, a safety payment?module, and a password keyboard module for inputting a payment password. According to the payment password?transmission method, the safety payment?module and the payment platform are mutually authenticated and an authentication key is generated; the payment password is inputted via the password keyboard module and uses the authentication key for encryption; decryption and encryption again are carried out via the safety payment?module, a payment password ciphertext is formed to be transmitted to the password keyboard module, and the password keyboard module transmits the payment password ciphertext to the mobile payment?module for use. During the payment password use process, the mobile payment?module can not touch a payment password plaintext, and the risk that the payment password is leaked can thus avoided.

The invention relates to a verification release method for software running. The method comprises the steps that a client side and a verification side of software are involved; the client side comprises a program embedding module, and the verification side comprises a program verification module; a verification release program is composed of a code conversion split check module, wherein the code conversion split check module in the verification side converts a digital file into a variable code, takes any random value of the variable code as a random seed and splits a segmentation code of the verification release program, and split codes are packaged into the program embedding module of the client side and the program verification module of the verification side respectively; when the verification side conducts verification, the program verification module loads the program embedding module of the client side, and after the codes are merged, the verification release program runs. According to the verification release method for software running, the codes need to be merged and then the program runs during verification, the situation can be avoided that the verification release program is broken and decompiled, so that the client side and the verification side have unique congruity, and the safety factor is higher. From the code level, the method is easy and ingenious to implement, the expenditure of complex hardware is not needed, and the whole method is more efficient.

The invention provides a data processing method and device for an application program. The data processing method of the application program comprises the following steps of packaging a code of the application program to obtain an APK file of the application program; and encrypting a dex file in the APK file to obtain a new APK file.

Embodiments of the present invention provide a continuous integration method and system. The method comprises the steps of receiving and recording the compilation result under the source file directory file through the forwarding file directory; comparing the record of the forwarding file directory with the record of the target file directory, and processing the forwarding file directory accordingto the comparison result so that the forwarding file directory only records the current compilation result; performing anti-decompilation processing on the current compilation result under the forwarding file directory to obtain the current anti-decompilation result; sending the present prevention decompilation result to the target file directory, so that the present prevention decompilation result is packaged and issued in the target file directory, and the problem of error of comparison result caused by small difference in file size is solved well when processing new files generated by incremental codes.

The invention discloses an application compiling method, an application running method and electronic equipment. The application compiling method comprises the steps: under the condition of compiling a source code of a first application, compiling each section of set source code in at least one section of set source code in the source code into a byte code; compiling a setting macro corresponding to each section of setting source code in the at least one section of setting source code into a first binary code, wherein the first binary code is used for being executed when a corresponding byte code is called under the condition that the first application is operated in a host state of a processor; when the first binary code is executed, using the first binary code for triggering a virtual machine monitor of the processor to compile a corresponding byte code into a second binary code, and triggering and switching to a client state of the processor to execute the second binary code.

The invention relates to a control method, system and device for vehicle access to a parking lot, and a storage medium. The method comprises the steps of receiving two-dimensional code information, fed back by a user, of an entrance or an exit of the parking lot; the two-dimensional code information of the entrance or the exit of the parking lot is analyzed, and a gate of the parking lot is controlled to be opened or parking payment information is sent to a user; wherein the two-dimensional code of the entrance or exit of the parking lot is generated by the following method: setting a two-dimensional code type, a parking lot ID, a channel value and a channel name; mapping the two-dimensional code type, the parking lot ID, the channel value and the channel name to obtain a two-dimensional code unique identifier; the field length of the unique identifier of the two-dimensional code is smaller than the sum of the field lengths corresponding to the two-dimensional code type, the parking lot ID, the channel value and the channel name; and generating a two-dimensional code of the entrance or exit of the parking lot according to the request domain name and the unique identifier of the two-dimensional code. The intensity of the finally generated two-dimensional code is moderate, and the two-dimensional code can be scanned more easily.

The embodiment of the invention provides a method, system and device for preventing decompilation and a storage medium, and the method comprises the steps: adding a first preset member variable and a second preset member variable in an initial source code, obtaining a first target source code, obtaining a Boolean expression of each judgment logic code block in the first target source code, and utilizing the first preset member variable and the second preset member variable to perform replacement operation on the Boolean expression according to a preset replacement rule to obtain a second target source code, compiling the second target source code to obtain an initial Class file, and performing homonymy processing on the initial Class file according to a preset constant homonymy rule to obtain a target Class file. Based on the difference between Java language specifications and virtual machine specifications, the target Class file can be normally operated by the virtual machine and cannot be decompiled into legal Java source codes with readability through replacement operation and homonymy processing. Therefore, the Java source code can be prevented from being decompiled.