INTERNATIONAL BUSINESS MACHINES CORPORATION (20240257233). PRIVACY-PRESERVING OVERDRAFT MANAGEMENT USING BLOCKCHAIN TECHNOLOGY
PRIVACY-PRESERVING OVERDRAFT MANAGEMENT USING BLOCKCHAIN TECHNOLOGY
Organization Name
INTERNATIONAL BUSINESS MACHINES CORPORATION
Inventor(s)
Kaoutar El Khiyaoui of Zürich CH
PRIVACY-PRESERVING OVERDRAFT MANAGEMENT USING BLOCKCHAIN TECHNOLOGY
This abstract first appeared for US patent application 20240257233 titled 'PRIVACY-PRESERVING OVERDRAFT MANAGEMENT USING BLOCKCHAIN TECHNOLOGY
Original Abstract Submitted
the invention is notably directed to a computer-implemented method of managing user overdrafts in a privacy-preserving manner. the method comprises issuing a first overdraft token computed based on a user identifier of a given user, an initial overdraft value, a first serial number, and an encryption key that is shared with the given user. next, the method generates a zero-knowledge proof of that said overdraft value is equal to a maximal value of credit granted to said given user. the method subsequently computes an overdraft issuance transaction based on the first overdraft token and the first zero-knowledge proof, signs the computed overdraft issuance transaction using a secret key that is not shared with the given user, and finally submits the overdraft issuance transaction to a blockchain for validation.