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Method and apparatus for performing encryption and decryption by using white box library file and white box key file

A technology of key files and library files, which is applied in the field of encryption and decryption using white-box library files and white-box key files, can solve problems such as key insecurity, and achieve a simplified encryption process, improved security, and convenient updating. Effect

Inactive Publication Date: 2018-06-19
BEIJING BANGCLE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a method and device for encryption and decryption using a white-box library file and a white-box key file to solve the problem of key insecurity in the prior art

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  • Method and apparatus for performing encryption and decryption by using white box library file and white box key file
  • Method and apparatus for performing encryption and decryption by using white box library file and white box key file
  • Method and apparatus for performing encryption and decryption by using white box library file and white box key file

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Embodiment Construction

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0040] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0041] In this application, a dynamic white box technical solution is mainly introduced. The so-called dynamic white box means that the white box library file does not need to be ...

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Abstract

The invention relates to the technical field of terminal security protection, and in particular, to a method and apparatus for performing encryption and decryption by using a white box library file and a white box key file for solving the problem that the key is insecure in the prior art. The method mainly comprises the following steps: obtaining the white box library file via a first parameter combination carried in a library file generation request; obtaining the white box key file via a second parameter combination carried in a key file generation request; and performing encryption and decryption processing according to the white box library file and the white box key file. By adoption of the technical scheme, the key update is more convenient, when the key is updated, the white box library file does not need to be updated, so that a dynamic white box encryption flow can be simplified, and the security of the key is improved. In this way, the security of decrypting a ciphertext andencrypting a plaintext by a user is improved.

Description

technical field [0001] The present application relates to the technical field of terminal security protection, in particular to a method and device for encrypting and decrypting by using a white-box library file and a white-box key file. Background technique [0002] With the development of terminal technology, more and more application programs are installed in the terminal. In the process of using these applications, users will generate some data that they do not want to be stolen by attackers, or users do not want the execution logic of the application itself to be reversely cracked by attackers. In order to protect the security of the application program and the data generated during its running, it is often necessary to encrypt these data. [0003] The traditional encryption technology is black-box encryption technology. Black-box encryption technology generally refers to the technology of encrypting plaintext data with an encryption algorithm in a black-box environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/06H04L29/06
CPCH04L9/083H04L9/0625H04L9/0631H04L63/0435H04L63/062H04L2209/16
Inventor 阚志刚陈彪王全洲卢佐华方宁
Owner BEIJING BANGCLE TECH CO LTD
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