Patent · US Active

Method and system of preserving privacy for usage of lightweight blockchain clients

US11303445B2 · kind B2 · utility

1Cited by

0References

14Claims

0Family size

Assignee

NEC CORPORATION · JP

Inventors

Sinisa Matetic · Zürich, CH
Karl Wuest · Zürich, CH
Moritz Schneider · Zürich, CH
Kari Kostiainen · Helsinki, FI
Ghassan Karame · Heidelberg, DE
Srdjan Capkun · Zürich, CH

Key dates

Filing date	Mar 27, 2019
Grant date	Apr 12, 2022
Priority date	—
Expiry date	May 21, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/56
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.