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Is it possible to release an update of an android app by signing it with a different certificate than the one originally used? I know it gives an error message normally when we try to upload such a build to the market. But is there any way out, like marking it as a major release, specifying somewhere in the market place?
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Open Play Console and go to the Play App Signing page (Release > Setup > App integrity). In the “Upgrade your app signing key” card, select Request key upgrade. Select an option to upgrade your app signing key to all installs on Android T and above.
The code signing certificate plays a pivotal role in protecting code integrity through hash function matching and timestamping. As the hash used to sign the code is eventually confirmed, it automatically verifies its integrity. So, the end-user can be sure that cybercriminals have not manipulated the code.
You generate a signing certificate with the Java Keytool command line utility that manages keys and certificates.
No, you can not do it. The certificate is a tool to ensure you're the one who firstly uploaded the application.
So always backup the keystore!
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