Is it safe to update Android via ZIP?

Question

Android

The previous question did not receive the desired feedback, so I'll be a little more specific:
Is it generally safe to update Android through zip archives? Rather, it’s not the question of what might not get up that worries, but the viruses on android that have become well-known recently. Could it be that by updating android via a zip file posted by some person, the device will be infected?
Perhaps there is some resource that is really worth trusting in this.

Answer 1

No matter how you pack, change the format, hash, you can still upload a virus to the file, so whatever you say, it’s not safe. Download from off-site firmware / games / programs, etc.

Answer 2

Without a digital signature, it does not matter in what format this or that file is. And even with a signature, you will not receive a 100% security guarantee. everything depends on the human factor in the end.