How does the Twitch iOS app keep me logged in after reinstalling it?
I thought that deleting an iOS app would delete all data related to that app. How does the Twitch app still know my account after I delete it and instal it again?
👤 solumos Accepted Answer ✓
Uber got in Big Trouble for this a while back[0]. Basically, device fingerprinting[1]. It seems like it's sort of OK now?
Slightly related, I was able to take over an account with functionality similar to this in one of the apps from a big tech company recently. I reported it but no response so far.
Are there companies using unique fingerprinting methods to map users for faster logins? I didn't test it further. It happened accidentally.