1.** Apply authentication: * *
The signature file is used to verify the identity of the application and ensure that the publisher of the application is legal and trustworthy. Through digital signature, developers can prove the source of the application to users and ensure that the application has not been tampered with after being published on the device.
2.** Apply update verification: * *
When an application needs to be updated, Android will check whether the new version of the application uses the same signature file. If the signature files match, the system will allow the update; If the signature files do not match, the system will reject the update. This helps to prevent malicious software from masquerading as a legitimate application to update.
Signature files are usually generated by developers in the early stage of application development, and are used to sign the application before it is released. The signature file contains the developer's private key, but the application only contains the corresponding public key when it is published. The private key should be properly kept to prevent criminals from obtaining it.
When using AndroidStudio or other development tools, signature files usually include:
-* * key storage file): * * *
The keystore file is a binary file containing the developer's private key and public key. The private key is used to sign the application, and the public key is embedded in the application.
-* * KeyAlias):** *
An alias is a name that corresponds to the private key in the keystore. When signing an application, the developer needs to specify a key alias.
-* * Password): * * *
Keystore is usually password protected. When signing an application or doing other operations involving the private key, you need to provide a password.
By signing the file, the Android system can verify the integrity and source of the application, thus ensuring users to install and update the application safely.
The above contents were carefully arranged by Zhu Bajie. Com, I hope I can help you.