Here's the paper:
https://github.com/AdamISZ/aut-ct/blob/auditing/auditor-docs/privacy-preserving-proof-of-assets.pdf
First half is quite discursive with no mathematics ... it's important to give the context of why (at least according to me) this is an interesting alternative way to do proof of assets compared to other approaches.
Feel free to share anywhere you think people might be interested. I will add a bit more to the doc later, but the actual algo is there.
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