[ARIN-consult] Consultation on Expanding 2FA Options for ARIN Online

Tue Jan 24 15:09:47 EST 2023

This is one reason I would strenuously oppose artificially limiting the # of TOTP / FIDO tokens one can register.  We don’t know why someone else behaves in a seemingly-irrational fashion.
(Actually, one outfit I’m vaguely-aware of refused to issue hardware keys to anyone except the senior execs because that’s a “perk” that the lower ranks “don’t deserve”.  Go figure.)
-Adam

From: Chris Woodfield <chris at semihuman.com>
Sent: Tuesday, January 24, 2023 2:07 PM
To: Ross Tajvar <ross at tajvar.io>
Cc: Adam Thompson <athompso at athompso.net>; arin-consult at arin.net
Subject: Re: [ARIN-consult] Consultation on Expanding 2FA Options for ARIN Online

I’m thinking of account sharing, not POC. Yes, you can associate multiple accounts with a POC, but some orgs just don’t bother and share a single set of credentials. I’d hope that 2FA would put a stop to that, but nothing prevents simply having each person sharing the account getting their own 2FA key*, unless you put a limit on the number of tokens.

-C

* Sounds improbable but I’ve seen stranger methods of credential sharing. A webcam stream of an RSA token being my best/worst example :)

On Jan 24, 2023, at 12:00 PM, Ross Tajvar <ross at tajvar.io<mailto:ross at tajvar.io>> wrote:

Each account does its own 2FA. You don't need multiple hardware tokens on the same account unless you're sharing that account, which is unnecessary, because you can associate multiple accounts with one POC. I don't think limiting the number of tokens will cause an issue for orgs with multiple human POCs.

Maybe I'm misunderstanding your concern?

On Tue, Jan 24, 2023 at 2:58 PM Adam Thompson <athompso at athompso.net<mailto:athompso at athompso.net>> wrote:
I *don’t* think we can nonchalantly apply the Pareto principle to authentication:  how are those ~20% of accounts going to do 2FA with ARIN next month?  The only way I can see is to register multiple TOTP authenticators.  Have I missed something?
-Adam

From: ARIN-consult <arin-consult-bounces at arin.net<mailto:arin-consult-bounces at arin.net>> On Behalf Of John Sweeting
Sent: Tuesday, January 24, 2023 1:56 PM
To: Heather Schiller <has at google.com<mailto:has at google.com>>; ARIN <info at arin.net<mailto:info at arin.net>>
Cc: arin-consult at arin.net<mailto:arin-consult at arin.net>
Subject: Re: [ARIN-consult] Consultation on Expanding 2FA Options for ARIN Online

Thanks for your input Heather.

Tangentially related, what percentage of accounts do you think have a single human poc?

Approximately 80% appear to have a single human poc

From: ARIN-consult <arin-consult-bounces at arin.net<mailto:arin-consult-bounces at arin.net>> on behalf of Heather Schiller via ARIN-consult <arin-consult at arin.net<mailto:arin-consult at arin.net>>
Reply-To: Heather Schiller <has at google.com<mailto:has at google.com>>
Date: Tuesday, January 24, 2023 at 2:16 PM
To: ARIN <info at arin.net<mailto:info at arin.net>>
Cc: "arin-consult at arin.net<mailto:arin-consult at arin.net>" <arin-consult at arin.net<mailto:arin-consult at arin.net>>
Subject: Re: [ARIN-consult] Consultation on Expanding 2FA Options for ARIN Online

Can we add, authorization should expire in <24hrs?  Per markk@ it expires in a week, which means anyone that gains access to that browser session will be able to effect changes.  Given that we've added more, not less, critical infrastructure impacting functionality to ARIN online, the security requirements should be stricter.

Historically, NIST explicitly recommended AGAINST using SMS as 2FA, going all the way back to 2016.
 "Due to the risk that SMS messages or voice calls may be intercepted or redirected, implementers of new systems SHOULD carefully consider alternative authenticators. If the out-of-band verification is to be made using the public switched telephone network (PSTN), the verifier SHALL verify that the pre-registered telephone number being used is not associated with a VoIP (or other software-based) service. It then sends the SMS or voice message to the pre-registered telephone number. Changing the pre-registered telephone number SHALL NOT be possible without two-factor authentication at the time of the change."

SMS based 2FA hasn't really gotten any better over the years.  I would not be in support of expanding the functionality of SMS 2FA.   Similarly, I would not support the use of email as 2FA either.

Tangentially related, what percentage of accounts do you think have a single human poc?

 --Heather

On Tue, Jan 24, 2023 at 1:54 PM ARIN <info at arin.net<mailto:info at arin.net>> wrote:
On 1 November 2022, ARIN  announced that we will require two-factor authentication (2FA) on all ARIN Online accounts beginning 1 February 2023. ARIN currently has three options for customers to set up 2FA on their ARIN Online accounts:

- Time-based One-time Password (TOTP) using an authenticator of your choice
- Short Message Service (SMS) for customers within the ARIN service region
- FIDO2/Passkey-enabled Security Key

Please note: Voice 2FA is not currently available for new 2FA activations; it is still available to those customers who already have that method set up on their accounts.

Following the announcement of the planned enforcement date of 1 February 2023, we received several suggestions for further expansion of our authentication offerings, including:

- Allowing email as an authentication method
- Enabling SMS support for customers who reside outside of the ARIN service region
- Allowing registration of multiple hardware security keys.

We are seeking community feedback on these suggestions as well as additional input on our 2FA options. Specifically:

1. Would you support ARIN offering email as an additional 2FA method?

2. Given that 13% of web user accounts list phone numbers outside the ARIN service region, should we widen the availability of SMS, or are the other offered 2FA options sufficient to meet the needs of these users?

3. We agree that users should be allowed to register multiple hardware security keys. The question is: What is the optimal number of keys that should be allowed to be registered?

The feedback you provide during this consultation will help us decide the path forward regarding our 2FA options for ARIN Online. Thank you for your participation in the ARIN Consultation and Suggestion Process.

Please provide comments to arin-consult at arin.net<mailto:arin-consult at arin.net>. You can subscribe to this mailing list at: https://lists.arin.net/mailman/listinfo/arin-consult

This consultation will remain open through 5:00 PM ET on 7 February 2023.

Regards,

John Curran
President and CEO
American Registry for Internet Numbers (ARIN)

Helpful Resources:

Consultation: https://www.arin.net/participate/community/acsp/consultations/2023/2023-1/
Two-Factor Authentication at ARIN: https://arin.net/2FA

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