CRA now allows 2FA apps
CRA now allows 2FA apps
What the title says. Before you had to choose either SMS / call via phone or a very clunky code grid.
This is a great feature. I just enabled it, and it works just fine. However, I was a bit confused when I didn't see any backup codes generated until I realized that the SMS/Call method is, in this case, the backup method. So, while it is more convenient to use an MFA app, I'm not sure about the security if the SMS method is still an option.
You can generate a code grid and remove SMS altogether.
Thank you so much for sharing this valuable information! Your input is greatly appreciated.
If I had the power to, I would've pinned this comment as it's helpful to those still using sms for backups👍
Authentication is only ever as strong as it's weakest link. All the fancy passwords, MFA, passkeys or whatever mean nothing in the face of "I forgot my password" email resets and the like.
I know people who just hammer randomly on the keyboard whenever they get asked for a password, then use the "I forgot my password" system to get "authenticated," providing yet another set of random keystrokes as the new password.
And it's not horrible, I guess. They're using strong passwords. They're never reusing passwords anywhere, not even for successive logins at the same site. They have to be explicitly targeted by someone who is willing to target their email system.
This does nothing to secure against mass breaches, but neither does the strongest authentication system. But, like any of the strongest authentication systems, account takeover requires deliberate targetting.
Yes but you’re free to use an email provider which also supports security keys, which gmail and proton mail* do. I understand that the CRA needs to accommodate the average person who doesn’t care about security, but I think everyone in this thread appreciates when they also cater to people who care deeply about security and are willing to use strong unique passwords in a password manager and security keys or at least TOTP.
*it seems like they require keeping TOTP enabled because their mobile apps don’t support security keys. Meh.
🤦🏻♂️
That’s great news! I’ll have to make that change next time I login.
Would it be too much to ask for security keys next?
This may sound like a wild fantasy to some, but the US IRS seems to have some partnership with ID.me which supports security keys. But I’m impressed that the CRA supports TOTP before major banks so maybe this could happen.
Granted they also have separate logins for state income tax and California is… well let me just say that I’m grateful that the CRA doesn’t force you to reset your password every 4ish months. (California state income tax (FTB?) does).
Not OP but I wanted to read more (edit: about CRA’s approach to TOTP, before getting the chance to try it myself), I searched and found this: https://www.canada.ca/en/revenue-agency/services/e-services/cra-login-services/multi-factor-authentication-access-cra-login-services.html#toc3
What is a third-party authenticator app?
A third-party authenticator app can be installed on an app enabled mobile or desktop device to be used for MFA. The app store offers many free third-party authenticator app options to choose from. Users will need to download an app that is compatible with the CRA sign-in services.
Using the app, the user scans a QR code with a mobile device when prompted. If unable to scan the QR code the user can manually enter the setup key the CRA provides into the app. The app will now be set up and the user will not have to complete this step again.
The app will then generate a 6 digit Time-Based One-Time Passcode (TOTP). When signing in to the CRA sign-in services users will be required to enter a one-time passcode provided by the app. For security, the app will generate a new TOTP every 30 seconds.
Edit: This is awesome, I’m so glad I can switch away from SMS 2FA on yet another service (and such an important one). But I am curious about a few things, see below.
Some thoughts:
- (edit: my bad, I thought 60 seconds was more common but I checked my other TOTP and they seem to be 30 seconds)
why is it 30 seconds instead of 60 seconds? I’m pretty sure every other TOTP I’ve seen is 60 seconds. What is the benefit of this? Someone has 30 fewer seconds to read the code over your shoulder and log in on their device? - TD offers a passcode generator app, but it seems like you can’t disable SMS 2FA, so if you’re worried about SIM jacking then you are out of luck. Presumably they’re worried about people losing their device with the TOTP secret, but I usually back that up on multiple devices and have recovery codes. I think all the big banks are similar. Edit: I’m curious to know what CRA does, but I’m away from my PC right now.
- nit: the previous login requires you to re enter the code from SMS 2FA or the grid thing every 8 hours I believe. But most other services seem to let you persist a cookie on the device for 30 days or so, presumably because cookie theft isn’t a huge risk, and because entering your password alone is enough to prevent other people with access to your computer from accessing your sensitive CRA account
Anyway, sorry for the negativity. This is a great step and I shouldn’t focus on negative things. I just hate how accounts I don’t care much about like Facebook (and formerly Runescape) accounts seem to be more secure from malicious logins than my bank and possibly CRA accounts.
Also big pro is that they allow third party TOTP apps instead of making their own like TD and even Steam (bundling it into their main app).
why is it 30 seconds instead of 60 seconds? I’m pretty sure every other TOTP I’ve seen is 60 seconds. My jaded take: the blind pursuit of “better security” even though… what does this even imply? Someone has 30 fewer seconds to read the code over your shoulder and log in on their device?
30 seconds is the default for TOTP implementations.
I’m curious to know what CRA does, but I’m away from my PC right now.
Yes, you can stop getting SMS messages.
edit: formatting
Thanks, I edited my comment. No idea how I missed that it was 30 seconds for all this time. It looks like my own TOTP codes are even 30 seconds so I don’t know what I was thinking.
I also use TD. That they still allow only SMS for 2FA should be a crime.
Unfortunately I think this is the norm with big banks in Canada, and it is similar to a credit union in the US from when I briefly lived there. Security seems to be a second priority to people losing access (presumably only briefly, since they have brick and mortar locations everywhere).
Wealthsimple and Questrade seem to support TOTP but I’m not sure if you can still bypass it with SMS. I don’t think so but I haven’t dug into it.
I’ve used CIBC before and they also seem to require keeping SMS 2FA enabled. Also they send me fraud alerts over SMS, “respond Y to authorize this suspicious transaction”, and I’m dreading the day where I have to enable roaming while travelling just to send a text. They send push notifications through the app to login on a new device though, so maybe in 10 years they’ll do it for transaction approval too.
Also aside about TD: is there really no way to download a CSV file of all your transactions? My partner uses them and I think we were limited to 18 months, and may have even had to download each much separately (luckily I can use use a program like
catto workaround this, but that seems like a pain for most people). CIBC has irritated me in a lot of ways but I think I can download transactions from back to 2012 when I first opened my credit card, maybe earlier.Do you or anyone know about other big banks? My partner and I are looking into a joint account and I want to be able to download all transactions to CSV. Ideally we could get TOTP only (no SMS 2FA) but I’m not counting on it.
It looks like you may be able to disable SMS 2FA entirely? It’s unclear to me (edit: if this is a viable option):
Can I stop getting Short Messaging Service (SMS) messages for CRA's Multi-factor authentication?
Yes. You can text "STOP" to 27223 or reply "STOP" to the message containing your one-time passcode to stop receiving SMS messages to that telephone number in the future. However, it is important to note that CRA's Multi-factor authentication (MFA) service is mandatory and a passcode is required to sign in to the CRA's sign-in services. Texting "STOP" will prevent your telephone from receiving an SMS message with your passcode in the future. Without the passcode, you will be unable to access the CRA sign-in services using this option and will need to choose an alternate MFA option to use. This option applies only to Canadian telephone numbers.
I’ll probably leave it enabled anyway just in case (given that I only log in to CRA once per year or so), but I applaud the potential of relying on TOTP only, and not allowing SMS 2FA as a “back door”.
- (edit: my bad, I thought 60 seconds was more common but I checked my other TOTP and they seem to be 30 seconds)
Praise the Lord Jesus Christ our Saviour! It's about damn time! 😂
Makes me glad I live in BC, and have had an equivalent to this for years for signing into CRA stuff.