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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.:

US 10783272 B1

PDFFull Text
Date of Patent:
Sep. 22, 2020

Filed:

Dec. 08, 2017

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

Applicant:

Nec Europe Ltd., Heidelberg, DE;

Inventors:

Sinisa Matetic, Zurich, CH;

Ghassan Karame, Heidelberg, DE;

Srdjan Capkun, Zurich, CH;

Assignee:

NEC CORPORATION, Tokyo, JP;

Attorney:

Leydig, Voit & Mayer, Ltd

Primary Examiner:

Jeffery L Williams

Int. Cl.
CPC ...
H04L 29/06 (2006.01); G06F 21/62 (2013.01); H04L 9/32 (2006.01); G06Q 20/38 (2012.01); G06Q 20/22 (2012.01); H04L 9/08 (2006.01); G06Q 20/06 (2012.01); G06Q 20/36 (2012.01); G06F 9/54 (2006.01); G06F 21/31 (2013.01); H04L 9/06 (2006.01); H04L 29/08 (2006.01);
U.S. Cl.
CPC ...
G06F 21/6245 (2013.01); G06F 9/545 (2013.01); G06F 21/31 (2013.01); G06Q 20/065 (2013.01); G06Q 20/223 (2013.01); G06Q 20/36 (2013.01); G06Q 20/3674 (2013.01); G06Q 20/389 (2013.01); H04L 9/0637 (2013.01); H04L 9/0825 (2013.01); H04L 9/3247 (2013.01); H04L 67/04 (2013.01); H04L 67/104 (2013.01); G06Q 2220/00 (2013.01); H04L 2209/38 (2013.01); H04L 2209/56 (2013.01);
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 secure software guard extensions (SGX) enclave. A request is received from the lightweight blockchain client for a setup of a secure network connection. A client unique ID is received from the lightweight blockchain client, and is acknowledged following a successful attestation by the lightweight blockchain client. A request is received from the lightweight blockchain client for transaction(s)/address(es) of the lightweight blockchain client. The SGX enclave loads and searches unspent transaction outputs (UTXO) from a memory of the full blockchain node and sends a response to the request from the lightweight blockchain client for the transaction(s)/address(es) based on a match from the searching the UTXO. The secure communication is then terminated with the lightweight blockchain client.

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