[VoT] How to express duplicate checks with VoT?

Rolf Brugger <rolf.brugger@switch.ch> Thu, 10 March 2016 16:51 UTC

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From: Rolf Brugger <rolf.brugger@switch.ch>
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Date: Thu, 10 Mar 2016 17:51:04 +0100
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Subject: [VoT] How to express duplicate checks with VoT?
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Hi all,

I'm new to this list and I hope my question is not totally irrelevant here.

We have plenty of use cases where RPs need to have confidence, that a 
person does not have multiple identities in one IdP. I don't see how 
this aspect of identity quality can be expressed, and I believe it is 
pretty orthogonal to the P, C, M and A dimensions that are currently 
specified in the VoT draft.

We could imagine multiple ways to gradually prove that an identity has 
been checked against duplicates. The most straightforward approach would 
be to make sure that unique personal attributes are used only once 
within one IdP or an IdP federation, like
- email address(es)
- mobile phone number
- home postal address
- social security number
- ID / passport number
- the combination of name and birth date
- etc.

Would it make sense to express this in VoT?

best regards

Rolf


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Rolf Brugger, project Swiss edu-ID
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