Decentralized data mixing for anonymous and confidential blockchain payments, incognito coin swapping, and hidden weighted voting techniques

Abstract

The present disclosure provides a decentralized data mixing (DDM), a cryptographic scheme for non-interactive data mixing. The DDM scheme enables blockchain users to commit to specific data, and subsequently, utilize the encrypted version of this previously registered data across various blockchain applications without association to the original address that logged the data. DDM offers the following features: (i) no double redemption: a malicious user cannot redeem and use the same data twice; (ii) theft prevention: a malicious user cannot use data that is not registered by him; (iii) non-slanderabilty: a malicious user cannot prevent an honest user from using her data; and (iv) unlinkability: a malicious user cannot link a tainted data from an honest user to the corresponding mixed data.

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