No they don't. Other sign-on options don't obfuscate the email address.

They are likely removing FB login as otherwise their next app update will be rejected by Apple for supporting third party login but not Apple login.

My app isn’t untrustworthy at all either. It’s an experimental app which attempts to let users create an iOS app on iOS. My suspicion is that people choose to obfuscate because it’s what’s selected by default.

If I need an email to verify I'm not a bot, that's fine. But if a trusted 3rd party can verify I'm not a bot, then the only reason you would want my email is to do something unethical with it: namely, use my data in a way that I never intended gave you permission to use it.

Being default probably helps, because most people don't know they're doing with software and just accept the defaults assuming they're best practices. If the default were to share the email, you might see more people sharing email, but I would argue it's because people don't know they can and should obfuscate it.

This was addressed in the article. If the service provider does not have your email address, they are severely hampered with regards to customer support.

No, they're not. They're just relying on email as a user verification methods as it's the easiest approach. Other methods are possible.

Did you read the article? It seemed very clear to me that they had significant issues with customer support past just verification.

And what would you suggest as an alternative way to identify the user, anyway? Any alternative method of authentication seems doomed to fail - using a real name runs into issues with duplication, requiring users to set a username would likely require significant changes to the platform to support it and lots of people would forget it when they couldn't get their preferred username, and having a customer support code inside the app wouldn't help when the user loses access to their account.

It seems like there are alternatives, but none that the average user who signs in with Apple and needs to contact support will be able to get past on a consistent basis.

I actually think the customer experience of "I switched from apple to android and now I dont know any of my usernames" is a bigger issue. If apple wants Sign in with Apple to work, it needs to behave a bit more like an agnostic 3rd party password manager, work on every platform, and have ways to interact with it on any device. They should release Keychain as an Android app and Chrome extension, and allow you to use it to see your Sign in with Apple data.

If I can't contact my customers, how do I support them (e.g. report a security problem)? If my customers can't communicate which account is theirs, how do we help solve problems? Email addresses and/or phone numbers make this a lot easier.

I never want "communication" from an app developer unless I initiate it.

It's a fair point, and perhaps its one that the likes of Apple SignIn should solve. On the one hand, even Microsoft and Apple send me heaps of spam under the guise of "communication" and I don't want them to have my email address if I can avoid it. The OP says they have trouble with support, but they can (and it sounds like do) tell people to just check their Apple email. Most places that I contact for support require me to put in a contact email for that ticket because people use throw-aways anyway. As for security problems, well I'm glad you're one of the few companies to actually disclose security breaches. But if the information on the website is actually sensitive, then there should be additional checks to begin with. If it's CC info, you should contact the CC company, there should be 2FA, there should be more than an SSO service, which already prevents the biggest and worst security breach of leaked passwords. In short, I doubt the need to contact a customer unsolicited is so great, common, or difficult as to require that a user disclose a non-obfuscated email address, which people already commonly have throwaways for. And the reason they have throwaway accounts is because 99% of the time, when I give someone a ...@spamgourmet account or whatever, that address gets spammed, even though I told them not to put them on the mailing list (because they share the email with third parties, or just plain ignore it).

The tradeoff is a bad one. I do not have sensitive information on Reddit that is not public. A private investigator could probably deduce who I am by looking at my Reddit posts, figuring out where I live, where I went to school, what family members I have, what my job is. They don't need to contact me urgently about a security breach. You can say when I sign on and lock my account until I acknowledge it, but it's not urgent. Even a website that might need sensitive information and, for some reason, doesn't want to require I actually verify my identity for real to upload that sensitive information, that doesn't mean I'm using the website in that capacity and should give up identifying information in case I need to give up identifying information later and you need to contact me that my information has been leaked.

The perspective is worth thinking about, but I'm unmoved that it amounts to pushing the needle to "you need my real, primary email address." I believe the tiny, tiny minority of companies that actually need that and shouldn't just rejigger their system to better security and privacy practices to start with can find reasonable workarounds or resort to mild inconveniences like requiring a callback number on support.

So sure, it’s default, but unless I’m unique some people will see the default and go “why isn’t every 3rd party login like that?”.

I expect 99% are obfuscating because that’s the sensible choice to make. Giving an app my real email should only be done if there’s an explicit need for this, such as being able to log in from non-Apple devices.

https://developer.apple.com/documentation/sign_in_with_apple...

This is obviously the most useful for websites, but Apple’s developer site links to this with the descriptor “for web and apps on other platforms” so clearly they’re ok with Android apps using it too.

However, I've never built anything directly used "by the public", nor am I very familiar with how Apple Sign in works.

So I'm wondering, as the developer of a trustworthy app, what's the drawback in the user giving an obfuscated address?

Is it not possible for you to contact the user using this address? Does the user have to manually allow getting mail to this address or somehow jump through some hoops to read it?

Thanks for the clarification, I didn't think of this scenario.

This looks like a pretty big problem, as I can imagine a situation where the user doesn't have access at all to the app and may not have kept the initial email with any identifying info.

Isn't there an easy way for the user to know which obfuscated address was used for which app?

This email address is used for a lot of communication with Apple, e.g. receipts from App Store.

I bought my iMac on the Apple store, and the receipt was also sent to my personal account.

That's up to the user to decide. For me trustworthy = something like Basecamp, Amazon, etc, not some random small app.

> trustworthy = [...] Amazon

Good point, because your example includes one of the few companies I don't trust at all.

Trust not to misuse.

Trust not to leak in a breach.

Realistically, my email address is something I trust Amazon with both of, because email isnt how they spam me, they are smart enough they can identify me without my email address, and I expect their security to be more hardened and battle tested.

There is a big contradiction in there...

Everything experimental is by definition untrustworthy.

One is true obfuscation - "hide my email". That would be a poor choice for use with any app you hope to have an ongoing relationship with, I'd think.

The other is just the use of iCloud email addresses, detailed in the post, which seemed like a very good and concerning point. It's also much less likely to be a problem with FB or Google login.

And I would literally blow up at Apple, if they forced this on TripIt... Sharing trip information is done using registered email. And iCloud email is crap.

Could you provide any details? How is such "registered" email different than any other email?

At the very least Sign in with Apple needs to support a request for the user to enter the real email they want to use to be contacted by the app after-the-fact for cases where someone obfuscates their email but then wants access to functionality that explicitly requires their real email.

Having typed the foregoing, I realize now I'm basically just saying "don't use any third-party sign-in, including SIWA". Maybe it's fine that the ecosystem doesn't always cater to apps of questionable utility...

I assumed otherwise because they specifically wrote "sharing". Still, I'm not sure agree with:

> requiring them to provide a separate email from the one they registered with completely defeats the purpose of obfuscating the email in the first place

I can't use most apps without providing an email, whether they need it or not. That's a much worse situation than not being able to use some features without providing one (which still assumes me having no access to or knowledge of my own iCloud email).

But if you share a trip to a person who's on Tripit - they just get a notice and a record in their webapp.

Locking things down like this seems to have some serious negatives that Apple needs to reconsider their approach for.

So I don't even really understand how people get into this situation.

If they tied it instead to what people’s normal mail was, a lot of issues would be averted.

It seems like this entire complaint would be solved if Apple prioritized "obfsucated email works for our paying users" (i.e. deliver mail to an address they select) over "create a strong incentive to use our email service if they want to get their precious emails".

I use obfuscated emails all the time, everywhere, by default. But I selected what email address they forward to when I set it up. How does an app maker get the blame for Apple not doing this?

Edit: Now, the app relying on un-obfuscated email addresses for finding contacts I have less sympathy for. There are many other good options for this, and they should work with obfuscated email address IMO. Seems like everyplace I use has no trouble with usernames...

> "That’s become even more true as time goes on, since Facebook constantly seems to be upping the ante with creepy privacy practices. We use the Facebook SDK to provide login functionality, and every new release of the SDK seems to add new tracking options that are turned on by default, which we have to take action to disable. Furthermore, the Facebook SDK has quality problems, and recently caused a huge number of iOS apps to crash due to a misconfigured server."

> If a customer contacts us asking for support, and we need to look up something in their account, typically we can just ask them for the email address on their account. But with “Hide My Email” that wouldn’t be easily possible, because the customer would have to figure out the privaterelay.appleid.com email address used for their account.

> Furthermore, if there are platforms where AnyList doesn’t support Sign in with Apple, like Android, and someone wants to log into their account, they’d have to know their privaterelay.appleid.com email address. (And that certainly won’t be easy to find if you no longer have an iOS device.) And then they’d have to create a password with us, since they wouldn’t be able to sign in using Sign in with Apple.

> Finally, for a service like AnyList, which is heavily focused on sharing lists with other people, the “Hide My Email” option greatly complicates collaboration. Typically, customers share a list by typing in the email address of the person they want to share with. If that person already has an account, the list is instantly shared. But with the “Hide My Email” option, your spouse or friends obviously won’t know your privaterelay.appleid.com email address, so when they enter your email address, our systems will believe that you don’t have an account. At that point, you’ll get an email from us asking you to create an account. If you accidentally create a new account, it won’t include the work you’ve done in your existing account created via Sign in with Apple. And if you manage not to make that mistake, then there would be a link between your email address and the account you created with Sign in with Apple, negating the value of hiding your email address.

For the second, that’s entirely the user’s choice. Your app can also allow them to associate a new email address for this purpose (which strikes me as exactly what you actually want since the real unstated motivation here is getting the user’s email).

For the third, don’t make me type in someone’s email. The exact same issue as described happens if they have multiple email addresses too. Just let me use my OS’s sharing mechanism to send a special link that they can open to establish the sharing connection. An invite to share, as it were. Not only does that solve the problem, it’s significantly more user-friendly.

So the solution here is for a developer to add a bunch of code to their codebase on at least 4 platforms just to get to the same exact functionality and level of privacy, but with a worse user experience?

> For the third, don’t make me type in someone’s email. The exact same issue as described happens if they have multiple email addresses too. Just let me use my OS’s sharing mechanism to send a special link that they can open to establish the sharing connection. An invite to share, as it were. Not only does that solve the problem, it’s significantly more user-friendly.

As a user, I find that functionality to be incredibly clunky by comparison (on all platforms). It may be moderately better on iOS than Android, but even then Anylist and others are running multiplatform apps. If I'm using a computer and I need to manually copy a link, open my email client, compose a new email, type the subject and a message, paste the link, and hit send, that feels dramatically more cumbersome than just entering an email address and hitting "share". It also takes a good amount of new code to implement something like that on an existing system that uses email-based sharing, which I don't think developers should have to deal with just because Apple built a lousy login system.

You need to support letting the user change their email address anyway. Letting them change it from the privacy forwarding email to something else is no different. And that shouldn’t even interfere with using Sign In With Apple going forward because surely you’re using the user’s unique identifier from Apple to associate the sign-in with your service’s user.

Also FWIW you can use the Sign In With Apple JS approach on non-Apple platforms. This is obviously useful for web, but Apple’s developer site says it’s “for web and apps on other platforms” so you could use this from Android too, it will just take some more work.

> As a user, I find that functionality to be incredibly clunky by comparison (on all platforms).

As a user, I have never connected with someone on a service by typing in their email address. Not only do people routinely have multiple email addresses (e.g. work and personal), but people also often use unique addresses for services (e.g. plus addresses), so it’s not at all a reliable mechanism.

> If I'm using a computer and I need to manually copy a link, open my email client, compose a new email, type the subject and a message, paste the link, and hit send

Why would you do all this? The service can offer a mailto: link that pre-fills the body, so all you have to do is click it, type in the recipient’s email address, and hit Send. And this lets you customize the message as appropriate. Better yet, on Apple platforms you can use the built-in share functionality, including on web with the Web Share API[1].

And if you really don’t want to do all of that, you could have me enter an email that you send a special link to rather than looking up in your user database. That’s still not great for me as a user because it means I’m giving you someone else’s email address, which I don’t want to do, but it’s better than nothing.

The simple fact is, if your sharing mechanism requires me to know the email address someone else has already used to sign up for your service, it’s a crappy sharing mechanism.

[1] https://caniuse.com/#feat=web-share

as thomaslord said, this is an enormous overhead, where a lot can go wrong.

> For the second, that’s entirely the user’s choice. Your app can also allow them to associate a new email address for this purpose (which strikes me as exactly what you actually want since the real unstated motivation here is getting the user’s email).

Even more overhead, and more data to manage.

> For the third, don’t make me type in someone’s email. The exact same issue as described happens if they have multiple email addresses too. Just let me use my OS’s sharing mechanism to send a special link that they can open to establish the sharing connection. An invite to share, as it were. Not only does that solve the problem, it’s significantly more user-friendly.

For native only apps, this would also add an additional overhead, as you need to develop a server to handle this.

The point is simple: if you want to protect your email address, that's on you. I personally use a different email address for each service, because it's important for me. But I don't expect everyone will bend over backwards to accommodate me, and neither should you.

I'm not saying this is necessarily a good thing, but this is how things work and I don't have a better suggestion.

In general, sites use email as an indication of a unique, real person. I imagine most of them do not really care about it afterwards, which is why the SSO systems even work (though, they can demand an email too).

And to answer scarlac's question, yes, they removed this feature a very long time ago.

I don't share my "real" email address with Facebook.

My Google account isn't my main account, it's a throwaway I use for things that require email to sign up.

This is a general problem for all OAuth IdPs.

Don't worry, they know it anyway.

That's a pretty big argument specifically against Apple!

Username: Log in with FB

Password: <blank>

There are good use cases where third party logins are good enough.

I've tried pinging the developers to support the idea directly, but I've been met with incomprehension.

Not sure if I'm explaining it wrong, or if it's way more work than I'm anticipating.

[1] https://www.facebook.com/settings?tab=applications&ref=setti...

[2] https://myaccount.google.com/security

Nope, some of them also apply to Facebook, and Facebook has the additional destruction of privacy concern. They have to remove Facebook or support Apple too because of the policy and have chose neither instead of both.

Some of their concerns specifically don’t apply to Facebook/Google/anything directly tied to your real email that you’d otherwise choose to sign up with. You add a bit of complexity to your database to record different login types, but you can easily reconcile them to an existing user if the emails match, and provide the features they want like searching for a user by email.

It's not foolproof, but given I'm generating the password in Bitwarden anyway, it's not the end of the world if it doesn't catch it.

I too have struggled to remember which third party sign-on I used (or if I used a native sign in), so now I avoid them every time, too.

They're literally only convenient if I want to have an account that I'm happy to 'throw away' or, to accidentally create duplicate accounts for the service.

For anything where I'm actually paying, they're a nightmare. Oh, did I sign into this with one of my google accounts? Was I crazy enough to use facebook? Or which of my emails did I use?

I suppose that's a huge assumption, but that's how I would do it if I was developing against them. That said, it doesn't help w/ the "Hide my Email" or the default icloud.com email addresses people don't realize they're using.

But if you have a Password Manager, then it is literally a single signon solution in and of itself, without the sacrifice of privacy.

Probably, and this shouldn't be a thing. Except maybe for banks, but even then, it's debatable. Here's a handy list of cases when I want to be logged out:

1. I click the log out button.

Which I don't ever do either, because it's my personal device.

Account creation sucks, but I prefer it to letting an ID provider know about it. Although I would trust real third party ones like auth0 more than Facebook or Apple, even if they have a more focused business model.

Whcih is pretty bad for both developers and users, as a user I cant run my own identity provided and as a developer I have to spend time setting up accounts with ever identity provider i wish to integrate.

Original OpenID just let me as a user use a URL as my identity, so I could use any identity provider I wanted, including running one myself.

EDIT: There is a specification for dynamic client registration but nobody implements it as far as I've been able to tell.

Of course, there may be competing SSSO solutions...

https://en.wikipedia.org/wiki/IndieAuth

https://indieauth.net/

Next, if you don’t add a second-factor with to it, it becomes a ticking countdown until the account is compromised.

From the article...

> In addition to these customer experience problems that are common to all third-party login systems, Sign in with Apple introduces several more that are unique to it.

The one thing that is specifically against Apple is the new App Store policy that if an app uses google/Facebook sign in, the app _must_ also use Apple Sign In.

Doesn't it somewhat defeat the purpose of using a password manager if you use one account to sign into multiple sites?

Sign on services from main accounts seem like security flaws. If you use one main account resonsible for all your 'main things' to sign in to all the 'other things' that gives one vector of attack to enter or compromise 'all the things'.

Password managers exist to make the management of many things as easy as one thing, not to adapt to using one thing for everything, that's pretty much the opposite of what a password manager does.

Sign on services don't exist for convenience, despite being marketed that way, they exist to increase data collection abilities. Password managers exist to make using multiple accounts as easy as using a sign on service, that's the point. They should be separate from existing providers. They are an alternative to them.

Second, it often still takes a lot of work to create a new account on a site, even with a password manager. Selecting a username, discovering it's taken, selecting another one, generating a random password, pasting it into a second field to confirm the password, unchecking "send me updates", going to my email to find the confirm link, blah blah blah.

If I just want to do something quick on a site (like see a Quora answer or Medium post), it can be far easier to just click "log in with Google" and see the content in 5 seconds rather than 5 minutes while you wait for the damned account confirmation email.

Tangent: I signed up for a US TD account recently (in person). They had me write down the username I wanted, so I used LastPass on my phone to generate another random username. They obligingly made me an account with username "ajdgsbrjcobsdhfwvfk" - and password "tdbank123". Yes, I was required to change it on first login, but no, there was no attempt to verify that I was the one doing the changing (birthdate, SIN, etc).

Yes. Password managers exist to solve the problem of credential reuse; third-party login exists to implement credential reuse. They are fundamentally opposed.

I still agree that they are variants of the same fundamental problem (a single credential protects all of your logins) and that Password Managers are a vastly superior solution to this problem.

But it is worth pointing out that for the layman, using Sign in With Facebook/Apple/Google, is better than single credential re-use.

When I say "layman", I mean people like my mom and grandma. I have tried to get my mom to use a password manager (went as far as to set it up for her, and pay for it) but she just reverts to a simpler solution (which is Social SSO). If she weren't using Social SSO, she would be using her same Facebook password for every site on the internet. So as much as I personally loathe Facebook, I do trust Facebook for securing my Mom's credentials far more than the random scrapbooking website she is creating an account for. In this case, I am grateful that she is using Sign In With Facebook, even though I would never consider such an action for myself. So it is a small step in the right direction.

Granted, their only job is to secure your passwords, but it's effectively equivalent to a single SSO service from a protection standpoint (if all your accounts would accept that SSO login).

"Another issue is Sign in with Apple’s “Hide My Email” feature. With this feature, if you create an account with us, Apple will generate a special email address just for that account. So rather than your email address being [email protected], we will see your email address as something like [email protected]. While this is an intriguing idea that provides a measure of privacy, in practice it creates numerous support and user experience headaches..."

Bookwalker (from Japan) draws a big red box around the login you used last on a given device. Presumably they store a cookie/sharedpreferences with it. It doesn't look pretty, but it helps.

1. Apple obfuscate email - this complicates the support system, and as per them Apple hadn't thought about it thoroughly. Collaboration is obstructed. Password recovery is not an easy process. 2. Cross Platform - The post states that Apple vaguely says that sign in on Android is possible, but doesn't state how it is to be done.

They do?

https://developer.apple.com/documentation/sign_in_with_apple...

What about the argument that users check their gmail addresses regularly but rarely check their icloud email addresses?

You can. On each of the places you mention (Google and Facebook, certainly), somewhere in a settings page/window, you'll find your list of 'authorised apps'.

These will be a list the login systems to the third-party sites you've used to log in with.

You should then see a way to 'revoke' their access to your data.

When you log in for the first time it should request permission to "see your email address". Then you authenticate with your provider and get redirected back at which point the website should create an account for you on behalf of that email address. If next time you log in again via a complete different provider which has the same email address then it should just work. I mean that is the whole point of this...

Nope, not all their arguments. Only some.

I absolutely agree that password managers could remember this stuff. Single-signon is pretty easy to identify and you could setup the relationship.

You return to the site and if you have logged in with social media site before, and it detected you are still logged in, it will auto login for you.

That section of the post was surprising. If they're not supporting Sign in with Apple, then obviously they're going to remove support for all other third-party sign-ons, because those third-party sign-ons are what trigger the obligation to support Sign in with Apple.

Ending their post about "why we won't be supporting Sign in with Apple" with a note that they're also ending Sign in with Facebook on the merits of third-party sign-in is quite disingenuous. It doesn't matter at all what they think about the merits of Sign in with Facebook; those thoughts are completely irrelevant to their decision.