The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2025
Filed:
Dec. 13, 2021
Commissariat a L'energie Atomique ET Aux Energies Alternatives, Paris, FR;
Christine Hennebert, Grenoble, FR;
Abstract
The present invention relates to a method for selective disclosure of confidential data of a first user to a second user of a blockchain (). The first user is equipped with a deterministic hierarchical key portfolio () and selects a leaf of the tree of the portfolio as an emitter account. A secret key is derived from the chain code of this emitter account and the data to be disclosed are encrypted using this secret key. The first user transmits, by means of a first transaction, the data encrypted in this manner to a smart contract () which stores them in the blockchain. It transmits by means of a second transaction an access credit to the smart contract which stores it in connection with the pair formed by the emitter account of the first user and the receiver account of the second user. The second user transmits a third transaction to the smart contract from its receiver account (). If the credit is not zero, the smart contract makes available to the receiver account the encrypted data stored in the blockchain in connection with the emitter account of the first user.