The original:

После логаута одного из собеседников ключ для чата будет перегенерирован, а проверить то, что я имею тот же ключ что и собеседник я могу только посмотрев в его телефон глазами.

My (human) translation:

After one of the participants will log out, the key from the chat will be re-generated, but in order to check that I have the same key as them, I would need to see their phone with my own eyes.

This sentence has a particularly non-English word order, plus some missed punctuation. I can see how it would be a hard case for machine translation.

The thing is, I though it was poorly written English, written by a non native speaker, rather than a computer.

I must also clarify that I was a little distracted.