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Re: [OAUTH-WG] draft-parecki-oauth-browser-based-apps-00

Hans Zandbelt <hans.zandbelt@zmartzone.eu> Mon, 19 November 2018 10:03 UTC

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From: Hans Zandbelt <hans.zandbelt@zmartzone.eu>
Date: Mon, 19 Nov 2018 11:03:04 +0100
Message-ID: <CA+iA6ugTpEAZe22=uwb31x+F2zVVdM9wUHrar1eiL6UO5e9xuw@mail.gmail.com>
To: Vladimir Dzhuvinov <vladimir@connect2id.com>
Cc: "oauth@ietf.org" <oauth@ietf.org>
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Subject: Re: [OAUTH-WG] draft-parecki-oauth-browser-based-apps-00
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+1 to the suggestions that Vladimir raises; I've seen a fair number of
requests  in the field for exactly that

Hans.

On Mon, Nov 19, 2018 at 10:59 AM Vladimir Dzhuvinov <vladimir@connect2id.com>
wrote:

> On 17/11/2018 13:26, Torsten Lodderstedt wrote:
>
> To start with, the AS may use refresh token rotation in combination with automatic revocation in case of detected replay attempts.
>
> How does it work? The AS issues a new refresh token with every refresh and invalidate the old one. This restricts the lifetime of a refresh token. If someone (might be the legit client or an attacker) submits one of the older, invalidated refresh token, the AS might interpret this as a signal indicating token leakage and revoke the valid refresh token as well. We used this technique at Deutsche Telekom since our first OAuth 2.0 implementation back in 2012.
>
> This is a clever solution. Did you experience any false positives, e.g.
> due to HTTP response timeouts on slow / poor connections?
>
> We were also thinking of additionally binding the refresh token to the
> end-user session at the AS / OP:
>
>    - A valid refresh causing the session to be refreshed too
>    - AS / OP logout or session expiration invalidating the refresh token
>
>
> Vladimir
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> OAuth@ietf.org
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>


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