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Proof of creditworthiness short use case per issue #137 #156

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Proof of creditworthiness short use case per issue #137 #156

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2 changes: 2 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -427,6 +427,8 @@ <h3>Finance</h3>
data-include-replace="true" data-format="html"></div>
<div data-include="short/f5_new_bank_account_from_home.html"
data-include-replace="true" data-format="html"></div>
<div data-include="short/f6_proof_of_creditworthiness.html"
data-include-replace="true" data-format="html"></div>
</dl>
</section>

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8 changes: 8 additions & 0 deletions short/f6_proof_of_creditworthiness.html
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<dt>
<udef>F.6 Proof of creditworthiness</udef>
</dt>
<dd>
<p>Alice has checking and saving accounts, loans, and credit cards at multiple banks. Due to local regulatory restrictions, the banks may not exchange information about the subjects they issue credit cards to.</p>
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<p>Alice has checking and saving accounts, loans, and credit cards at multiple banks. Due to local regulatory restrictions, the banks may not exchange information about the subjects they issue credit cards to.</p>
<p>Alice has checking and saving accounts, loans, and credit cards at multiple banks. Due to local regulatory restrictions, the banks may not exchange information about the subjects to whom they issue credit cards.</p>


<p>To prove her creditworthiness when applying for a mortgage, Alice acquires verifiable credentials issued by each bank containing type and balance for each account. She creates a verifiable presentation aggregating all accounts (type and balance) without revealing any issuers of the underlying data.</p>
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The phrase underlying data reads to me as if the VP is doing a selective disclosure over the data in the VCs, but I don't believe we have a mechanism for that.

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<p>To prove her creditworthiness when applying for a mortgage, Alice acquires verifiable credentials issued by each bank containing type and balance for each account. She creates a verifiable presentation aggregating all accounts (type and balance) without revealing any issuers of the underlying data.</p>
<p>To prove her creditworthiness when applying for a mortgage, Alice acquires verifiable credentials issued by each bank containing type and balance for each account. She creates a verifiable presentation aggregating all accounts (type and balance) without revealing any issuers of the underlying data.</p>

What we could do is pass the balance and bank info on, while avoiding the legacy approach of providing bank statements with all the account transactions.

Or maybe something with zksnarks to add a custom predicate to the VP, but I haven't seen anyone work through those details.

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Per our conversation today, let's look at a set of selectively disclosable verifiable credentials which comprise a 3 year history of bank activity (one statement per months). Using predicate proofs, our hero is able to demonstrate that in each and every month they maintained a balance of at least $50,000 USD, without revealing the actual balance values nor the actual transactions.

</dd>