Android Security-Data security 1-string security in code

Source: Internet
Author: User

Android Security-Data security 1-string security in code

In the development of Android applications, it is unavoidable to use some sensitive information, such as the address of the server, for
These strings, if hard-coded, are easily accessible through static analysis and can even be used with automated analysis tools
Batch extraction. For example, if you define a string in the Java source code as follows:

Code:
1. String str = "I am a string!";

The corresponding code in the decompile. Smali code is as follows (the registers may differ):

Code:
1. Const-string V0, "I am a string!"

For automated analysis tools, you can extract a string value only by scanning to the Const-string keyword. therefore should
To avoid defining string constants in the source code, it is easier to use the StringBuilder class through append
method to construct the required string, or to use an array to store the string. Using StringBuilder to construct characters
The following code is used in this way to increase the difficulty of automated analysis, if you want to fully extract a
String, if only using static analysis method must be the corresponding lexical syntax parsing.

In addition, strings can be encrypted, for example, some important functions of the code will be the server address and other important information encryption processing, run-time and then decrypt.

Android Security-Data security 1-string security in code

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.