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Ask HN: 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?
- searchableguy 6y agoSlightly 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.
- solumos 6y agoUber got in Big Trouble for this a while back[0]. Basically, device fingerprinting[1]. It seems like it's sort of OK now? [0] https://the-parallax.com/2017/04/26/uber-device-fingerprinting/ https://the-parallax.com/2017/04/26/uber-device-fingerprinti... [1] https://nshipster.com/device-identifiers/ https://nshipster.com/device-identifiers/
- neximo64 6y agoApple keychain