If there’s a match, it means that the same key was used to sign a previously known legitimate app, therefore validating the new upload. For new apps that have never been published on, we try to match the signatures to other existing apps by the same developer. We make sure that the cryptographic signatures for new versions of all previously published apps match the original ones, which means we know if the new version APKs were signed by the real devs or someone pretending to be them. All apps are verified prior to publishing. How do we make sure the updated Apps are real and created by the respective developers? 1.
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Please refer to the following authoritative information to check the reason. Why using SHA1 to check the identification of certificate is safe? That’s a cryptography problem. The downloadable file is original and it has not been modified in any way. Trusted Badge Official records from APKPure and Google Play confirm that the developer used a trusted and verified digital signature. Note: We’ll decline all APKs with ‘debug’ certificate, which are not safe.