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arXiv 1111.5228q-fin.RMcs.CEcs.CRq-fin.CP
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共享金融Risk Exposures的隐私保护方法

Privacy-Preserving Methods for Sharing Financial Risk Exposures

Emmanuel A. Abbe, Amir E. Khandani, Andrew W. Lo

摘要:

与知识产权可申请专利的其他行业不同,金融业依靠贸易保密来保护其业务流程和方法,这可能会使监管机构和公众无法了解关键的金融风险。我们开发了共享和汇总此类风险敞口的方法,以保护所有相关方的隐私,而无需可信的第三方。我们的方法采用安全的多方计算技术从密码学中,多方能够计算联合函数,而不透露他们各自的输入。在我们的框架中,各个金融机构评估其专有数据的协议,这些数据不能被反转,从而导致对实值统计数据的安全计算,例如集中指数,成对相关性以及其他单点和多点统计数据。所提出的协议是计算上听话的现实样本量。潜在的金融应用包括:构建保护隐私的银行资本和杠杆率实时指数;监测委托的证券投资;财务审计;以及公布专有交易策略的新指数。

英文摘要:

Unlike other industries in which intellectual property is patentable, the financial industry relies on trade secrecy to protect its business processes and methods, which can obscure critical financial risk exposures from regulators and the public. We develop methods for sharing and aggregating such risk exposures that protect the privacy of all parties involved and without the need for a trusted third party. Our approach employs secure multi-party computation techniques from cryptography in which multiple parties are able to compute joint functions without revealing their individual inputs. In our framework, individual financial institutions evaluate a protocol on their proprietary data which cannot be inverted, leading to secure computations of real-valued statistics such a concentration indexes, pairwise correlations, and other single- and multi-point statistics. The proposed protocols are computationally tractable on realistic sample sizes. Potential financial applications include: the construction of privacy-preserving real-time indexes of bank capital and leverage ratios; the monitoring of delegated portfolio investments; financial audits; and the publication of new indexes of proprietary trading strategies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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