[OAUTH-WG] How does OAuth harm privacy ?
Denis <denis.ietf@free.fr> Mon, 01 March 2021 15:29 UTC
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To: Jim Manico <jim@manicode.com>
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From: Denis <denis.ietf@free.fr>
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Subject: [OAUTH-WG] How does OAuth harm privacy ?
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Hello Jim, Since you dared to raise the question: "*How does OAuth harm privacy* ?", I need to respond. I changed the tile of the thread accordingly. With OAuth, the RS must have a prior relationship with the AS (which is not scalable). When the client calls the AS, the AS is able to know which is the RS and then is in a position to know which end-user is likely to access which RS. When furthermore *token introspection* is being used, the AS is in a position to know exactly when an end-user is performing an access to every RS. Some people would say that the AS is able to act as *Big Brother*. While this might be acceptable within a single domain (i.e. all the users, ASs and RSs belong to the same organization or company), this is a serious concern if/when used in general over the Internet in a multi-domain case. Since the access tokens are considered to be opaque to the clients (and hence to the end-users), a client is not supposed to verify which privileges have effectively been inserted into an access token, in particular whether a unique identifier that would allow the RSs to correlate the accounts of their users has been maliciously added into every access token. In your email you wrote: I don’t see how moving from handing your creds over to a third party to OAuth2 workflows, harms either privacy or security. I hope that the facts mentioned above will allow you to see that OAuth does harm the user's privacy. Denis > >> Il 01/03/2021 15:13 Jim Manico <jim@manicode.com> ha scritto: >> >> >> How does OAuth harm privacy? > I think you are analyzing the matter at a different level. > > If you start from a situation in which everyone is managing their own > online identity and credentials, and end up in a situation in which a > set of very few big companies (essentially Google, Apple and Facebook) > are supplying and managing everyone's online credentials and logins, > then [the deployment of] OAuth[-based public identity systems] is > harming privacy. > > Centralization is an inherent privacy risk. If you securely and > privately deliver your personal information to parties that can > monetize, track and aggregate it at scale, then you are losing privacy. > > -- > > Vittorio Bertola | Head of Policy & Innovation, Open-Xchange > vittorio.bertola@open-xchange.com <mailto:vittorio.bertola@open-xchange.com> > Office @ Via Treviso 12, 10144 Torino, Italy > > _______________________________________________ > OAuth mailing list > OAuth@ietf.org > https://www.ietf.org/mailman/listinfo/oauth
- [OAUTH-WG] Assessing the negative effects of prop… Andrew Campling
- Re: [OAUTH-WG] Assessing the negative effects of … Jim Manico
- Re: [OAUTH-WG] Assessing the negative effects of … Vittorio Bertola
- [OAUTH-WG] How does OAuth harm privacy ? Denis
- Re: [OAUTH-WG] How does OAuth harm privacy ? Jim Manico
- Re: [OAUTH-WG] Assessing the negative effects of … Jim Manico
- Re: [OAUTH-WG] Assessing the negative effects of … Phil Hunt
- Re: [OAUTH-WG] How does OAuth harm privacy ? Warren Parad
- Re: [OAUTH-WG] Assessing the negative effects of … Phillip Hallam-Baker
- Re: [OAUTH-WG] Assessing the negative effects of … Warren Parad