Kong Obtainium, which is considered as a secure and private alternative
Considered by who?
Kong In my opinion being Obtainium user is quite risky.
Now we are talking.
Kong I understand that the main problem with installing from Aurora is probability of downloaded malformed application?
This is not recommended on GOS, you can use it, but it gives no privacy/security benefits.
Kong Is it not same if you are connecting to wrong source with Obtainium for example?
There is no "wrong source", you download apps from Google. Aurora is just a proxy to do this.
Kong downloading proper apk from official source, then checking it integrity with database can I have right to believe that using Aurora as the updater may rescue me from malware apps? If it's true, then I do not want to use Obtainium anymore.
Those are entirely separate things. Aurora is a proxy to the officeal Play store, Obtainium is just an app for
Play apps. Some apps will be only on Github/F-Droind which Obtainium is for. Most of apps, and I talk about
a big number, more than 99%, will only be abailable using Play store.