​Thanks​ Sincerely, John Wunderlich @PrivacyCDN https://twitter.com/PrivacyCDN Call: +1 (647) 669-4749 eMail: john@wunderlich.ca On 13 November 2016 at 14:44, Sarah Squire wrote:

Because UMA leverages OAuth transactions, it is vulnerable to these same attacks. However, they can be mitigated by use of existing Proof Key for Code Exchange (PKCE - pronounced "pixie") protocols. I know Justin has implemented PKCE in MITREid Connect. Not sure about other implementations.

Sarah

Sarah Squire Engage Identity http://engageidentity.com

On Sun, Nov 13, 2016 at 11:28 AM, John Wunderlich wrote:

...

Has anyone looked at “Signing into One Billion Mobile LApp Accounts Effortlessly with OAuth 2.0. https://www.blackhat.com/docs/eu-16/materials/eu-16-Yang-Signing-Into-Billio...” for applicability to UMA?

Sincerely, John Wunderlich @PrivacyCDN https://twitter.com/PrivacyCDN

Call: +1 (647) 669-4749 eMail: john@wunderlich.ca

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Timely reminder about that article; it's very helpful. And this is making me think even more about the right way to characterize UMA vis a vis OAuth in our intro section (I should be able to work on that tomorrow). If OIDC is fudge, what is UMA? S'mores? Eve Maler (sent from my iPad) | cell +1 425 345 6756

On Nov 13, 2016, at 9:04 PM, Justin Richer wrote:

Not only that, but many of the attacks are on assumptions about how to use OAuth to make an authentication protocol. The paper does a decent job of explaining this, and I’ve also written an article on the topic:

https://oauth.net/articles/authentication/

The same assumptions would be applied to UMA, which is also not an identity and authentication protocol.

— Justin

...

On Nov 14, 2016, at 4:46 AM, John Wunderlich wrote:

​Thanks​

Sincerely, John Wunderlich @PrivacyCDN

Call: +1 (647) 669-4749 eMail: john@wunderlich.ca

...

On 13 November 2016 at 14:44, Sarah Squire wrote: Because UMA leverages OAuth transactions, it is vulnerable to these same attacks. However, they can be mitigated by use of existing Proof Key for Code Exchange (PKCE - pronounced "pixie") protocols. I know Justin has implemented PKCE in MITREid Connect. Not sure about other implementations.

Sarah

Sarah Squire Engage Identity http://engageidentity.com

...

On Sun, Nov 13, 2016 at 11:28 AM, John Wunderlich wrote: Has anyone looked at “Signing into One Billion Mobile LApp Accounts Effortlessly with OAuth 2.0.” for applicability to UMA?

Sincerely, John Wunderlich @PrivacyCDN

Call: +1 (647) 669-4749 eMail: john@wunderlich.ca

This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. _______________________________________________ WG-UMA mailing list WG-UMA@kantarainitiative.org http://kantarainitiative.org/mailman/listinfo/wg-uma

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Really important point, at least in the case of UMA we are clear about managing access, but even there authorization gets munged into authentication or identity. Some stems from the name, but more from misunderstanding, thanks for reminding me about this article, good time to push it. From: wg-uma-bounces@kantarainitiative.org [mailto:wg-uma-bounces@kantarainitiative.org] On Behalf Of Justin Richer Sent: Sunday, November 13, 2016 3:05 PM To: John Wunderlich Cc: wg-uma@kantarainitiative.org UMA Subject: Re: [WG-UMA] Applicability of OAuth 2.0 hack to UMA? Not only that, but many of the attacks are on assumptions about how to use OAuth to make an authentication protocol. The paper does a decent job of explaining this, and I’ve also written an article on the topic: https://oauth.net/articles/authentication/ The same assumptions would be applied to UMA, which is also not an identity and authentication protocol. — Justin On Nov 14, 2016, at 4:46 AM, John Wunderlich wrote: ​Thanks​ Sincerely, John Wunderlich @PrivacyCDN https://twitter.com/PrivacyCDN Call: +1 (647) 669-4749 eMail: john@wunderlich.ca On 13 November 2016 at 14:44, Sarah Squire wrote: Because UMA leverages OAuth transactions, it is vulnerable to these same attacks. However, they can be mitigated by use of existing Proof Key for Code Exchange (PKCE - pronounced "pixie") protocols. I know Justin has implemented PKCE in MITREid Connect. Not sure about other implementations. Sarah Sarah Squire Engage Identity http://engageidentity.com/ http://engageidentity.com On Sun, Nov 13, 2016 at 11:28 AM, John Wunderlich wrote: Has anyone looked at “Signing into One Billion Mobile LApp Accounts Effortlessly with OAuth 2.0. https://www.blackhat.com/docs/eu-16/materials/eu-16-Yang-Signing-Into-Billio... ” for applicability to UMA? Sincerely, John Wunderlich @PrivacyCDN https://twitter.com/PrivacyCDN Call: +1 (647) 669-4749 tel:%2B1%20%28647%29%20669-4749 eMail: john@wunderlich.ca This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. _______________________________________________ WG-UMA mailing list WG-UMA@kantarainitiative.org http://kantarainitiative.org/mailman/listinfo/wg-uma This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. _______________________________________________ WG-UMA mailing list mailto:WG-UMA@kantarainitiative.org WG-UMA@kantarainitiative.org http://kantarainitiative.org/mailman/listinfo/wg-uma http://kantarainitiative.org/mailman/listinfo/wg-uma