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:
Apr. 12, 2022
Filed:
Mar. 27, 2019
Nec Laboratories Europe Gmbh, Heidelberg, DE;
Sinisa Matetic, Zurich, CH;
Karl Wuest, Zurich, CH;
Moritz Schneider, Zurich, CH;
Kari Kostiainen, Zurich, CH;
Ghassan Karame, Heidelberg, DE;
Srdjan Capkun, Zurich, CH;
NEC CORPORATION, Tokyo, JP;
Abstract
A method of preserving privacy for usage of a lightweight blockchain client in a blockchain network includes using, in a full blockchain node of the blockchain network, a trusted execution environment (TEE). A secure communication is established between the lightweight blockchain client and the TEE. The TEE receives a request from the lightweight blockchain client for at least one transaction or address of the lightweight blockchain client. The TEE obtains unspent transaction output (UTXO) information with respect to the request from the lightweight blockchain client from a UTXO database by oblivious database access using an oblivious RAM (ORAM) protocol.