METHOD AND SYSTEM FOR A CENTRAL BANK DIGITAL CURRENCY WITH UNLINKABLE TRANSACTIONS AND PRIVACY PRESERVING REGULATION
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United States of America Patent
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Issued Date -
Sep 12, 2024
app pub date -
Aug 11, 2022
filing date -
Aug 27, 2021
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Abstract
The present invention relates to a digital transaction between a sender (S) and a recipient (R), wherein the digital transaction is certified by a central bank (B), while preserving the privacy of the transaction (T). In particular the transaction (T) is based on a first sender serial number (SSNi) and a first receiver serial number, both signed by the central bank (B) and dedicated to the transaction. The transaction is in addition based on commitment to a value, which is encrypted with a blind factor (BTx) and involves sender zero-knowledge proof (zKs) and receiver zero-knowledge proof (zKr) so that the central bank (B) has no knowledge of the value of the transaction neither of the identity of the sender and the receiver. The present invention also relates to a system and to a digital currency allowing such a digital transaction.
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