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Do not know what the purpose of code signing is? In fact, it is not difficult to solve this problem. Let the editor take you to learn how to solve it. I hope you will gain a lot after reading this article.

What is a code signature?

Code signatures are digital signatures added to software and applications, which are mainly used to verify the integrity of the code and ensure that the software code is not tampered with to ensure the security of users.

Signing the code for your software product before the product is released is already a necessary step. Let's list what will happen if your software doesn't use code signing.

The operating system issued a warning

If your software product is not code signed, the operating system will display a security warning when the software is installed. Take Windows as an example, the Windows system will issue a red security warning, which will be a very bad experience, and users will probably no longer install your software products.

APP cannot publish

For APP applications, if you don't sign the code, you will find that it is impossible to distribute the software in some APP publishing platforms. APP without a code signature is generally considered to be at risk, including malicious code, and will be blocked by the operating system during installation.

Be judged to be malware

Take Android as an example, if you install an APP app and find that the APP app is not code signed, it will be defined as malicious software, and Android will advise users not to install it, or simply block it and disable it.

There is a risk of tampering.

One of the main functions of code signing is to prevent software from being tampered with. For a software installation package that has been code signed, if the hacker adds malicious code, then the system will find that the code has been modified before the software installation, which will prompt the user that the installation package is at risk. In this way, the safety of users will be well ensured.

How does code signing work?

The principle of code signing is to use digital certificates to encrypt the hash value of software code once, a process called signature. Finally, add this signature value to the code. At this time, the hash value of the software code matches the signature value. If the software code signs and then makes any changes, the hash value will change. When the final signature is checked, the operating system will find that the hash value of the software does not match the signature value, thus it will find that the code has been illegally tampered with. This is how code signing is implemented.

Can code signatures be forged?

Because the code signature uses the digital certificate technology (that is, asymmetric encryption technology), the software company actually uses the certificate private key to encrypt the software code, and this certificate private key exists only. therefore, the hacker cannot get the private key of the certificate, so the hacker cannot forge the signature. Software that uses code signing can be said to be safe and reliable.

What are the characteristics of a code signing certificate?

Support for Windows kernel code

Support the digital signature of Windows kernel code .sys files, .cat files, and so on. It also supports digital signatures of .exe files, .dll files, .cab files, .ocx files, etc.

Ensure code integrity

Digital signature technology prevents the code from tampering and ensures the integrity of the code.

Prevent malicious code from being added

Digital signature technology prevents the injection of malicious code and ensures that users will not be attacked by malicious code or viruses when they are installed and used.

Free timestamp service

We provide free timestamp service, and users use timestamp service when signing code, which adds another layer of security to your software products.

Improve the corporate image

After digital signature, the software product will not pop up the system security warning during installation, and can show the name of the product publisher and improve the corporate image.

Thank you for reading this article carefully. I hope the editor will share what the role of code signing is helpful to everyone. At the same time, I also hope you can support us, pay attention to the industry information channel, and find out if you have any problems. detailed solutions are waiting for you to learn!

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