Privacy preserving risk assessment of credit securities

Assessing the risk associated to structured financial products such as collateralized debt obligations, involves processing information about diverse risk factors: some information comes from the different sources directly in aggregated form, therefore it is not possible to estimate the correlation among different risk components. In this paper we address the problem of assessing the credit risk associated to a borrower or to a security by privacy preserving methods. Specifically we suggest use Secure Multiparty Computation to merge the information from the different sources so as to compute more accurately the overall risk profile of securitized assets, without disclosing the information from each individual source.