Mobile App PIN lock
It would be nice to see an option on the mobile app (I use android personally) to set a PIN lock on using the app with a timeout feature. This way you may have the app remember your more complicated credentials (password and mailbox pass-phrase) but the app itself would need a 4 digit pin to view the contents. this way in the event you let a friend use your phone for a minute or so..or even have a nosy someone in their life, you can secure the app without having to type in the long complicated passwords each time.
features like this are used in Mint/Lastpass/Mega. Im not really looking for fingerprint locks so just a PIN would be a neat way to secure the app while the phone is being handled by another party
You can add a PIN code or use TouchID on the mobile apps: https://protonmail.com/support/knowledge-base/pin-lock-and-auto-lock-on-android/.
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GaryFoster commented
I like your article. If you need to find a place to download the PIN lock application, come with me to gameyolo to download. There are many apps and games for Android that are completely free.
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bojan commented
I us your mail service for some time via regular desktop version of Chrome and Firefox browsers, and Android app.
My Android app is locked with simple 4 digit PIN, and it is only appon my phone taht is secured with some sort PIN/Pass. I'm pretty sure in "correctnes" of PIN because a i use it for long time numerous time.
Yesterday I couldn't reach my mail because my PIN number was obviusly changed and app demand correct PIN and just counting down 10-0 to remaing try. I'm really sure that my phone wasn't physically by anyone and that I didn't change, neither forgot PIN.
I don't know the way that Android mobile app work but ... Is there any chance that I'm in some kind of surveillance or somebody else is remote changed my PIN to reach my mails. I doeesn't sense to me because to change it must neter old, and it is breaked (that shouln't be problem because it is simple one 4 digit) that he (or they) could use the old one without my knowledge.
Is it neccesarry to change the PIN to read my data, or is there some other explanation that PIn was changed. After this occurrance I reinstall app, set the same pin and now work again, but my concern is that some is reached my messages and mails. -
Robert commented
Actually, there needs to be a PIN option even after you log in on the iOS app. If I'm logged in to the iOS app, we should still have the option of requiring a PIN to open the app after login. If I'm logged in and someone breaks into my phone or if a friend wants to use my temporarily, they can tap on the Proton Mail icon and read my emails.
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Robert commented
I'd like to see this PIN feature added to the iOS app. I have a very complex password which is hard to remember and type. If I have to continue using is along with my username every time I open your iOS app, I'm much less likely to use the app and you may lose me as a customer. We need a PIN feature for the iOS version of your app.
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Anonymous commented
I forgot my PIN. what can I do to change it?
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Anonymous commented
I also would like this feature. My preference would be that the app should forget the encryption credentials every specified amount of time (say 24 hours or something). In the interim, as soon as the app closes / loses focus it should activate this lock so you have to enter a pin. When you've hit that specified amount of time, it should just prompt you for the password (or if it simplifies the development have it always prompt for the pin lock and then prompt for the password if it is over the specified amount of time).
With this service being so focused on security, I hesitate to ever let it remember it permanently.