公开(公告)号：US10235689B2

公开(公告)日：2019-03-19

申请号：US14222558

申请日：2014-03-21

Applicant: GOOGLE LLC

Inventor： Philipp Hertel ,  Paul Lee ,  Sheldon I. Walfish ,  Alexander W. Hertel ,  Steven Viavant ,  Dan Moisa ,  Gene Sokolov

IPC: G06Q30/00 ,  G06Q30/02 ,  G05B19/418

Abstract: Processing of point of sale (“POS”) redemptions via a “tap” of a contactless device comprises a POS data collector that facilitates a connection with a contactless device. A merchant scans items for purchase using a POS scanner, which captures product identification information. The POS scanner forwards the product identification information to a POS terminal. The POS data collector intercepts the product identification information between the POS scanner and the POS terminal. A user taps the contactless device in the POS data collector's radio frequency field, and a communication channel is established between the contactless device and the POS data collector. The POS data collector identifies the user via the contactless device and identifies coupons, merchant offers, and other value-added services to redeem with the transaction. The POS data collector forwards this information to the POS terminal, the redemptions are applied to the transaction, and the communication is terminated.

公开(公告)号：US20250080349A1

公开(公告)日：2025-03-06

申请号：US18285704

申请日：2023-04-25

Applicant: Google LLC

Inventor： Gang Wang ,  Marcel M. Moti Yung ,  Sheldon I. Walfish

IPC: H04L9/32 ,  G06F21/53

Abstract: Disclosed herein are systems, methods, and computer-readable media for enabling more secure multi-party computations (MPCs) using a trusted execution environment (TEE). In one aspect, a method includes executing, by a first MPC computer, a secure MPC protocol in a first TEE of the first MPC computer. The first MPC computer generates a request to a second MPC computer executing the secure MPC protocol in a second TEE of the second MPC computer. The first TEE determines that one or more attestation conditions are met by the first MPC computer executing the secure MPC protocol in the first TEE. In response to determining that the one or more attestation conditions are met, the first TEE generates an attestation token including one or more digital signatures for the secure MPC protocol executing in the first TEE. The first MPC computer sends the attestation token with the request to the second MPC computer.

公开(公告)号：US12120223B2

公开(公告)日：2024-10-15

申请号：US18346513

申请日：2023-07-03

Applicant: Google LLC

Inventor： William Douglas Cox ,  Bo Zhu ,  Orest Bolohan ,  Sheldon I. Walfish

IPC: H04L29/06 ,  H04L9/06 ,  H04L9/08 ,  H04L9/30

CPC classification number: H04L9/085 ,  H04L9/0637 ,  H04L9/0643 ,  H04L9/30

Abstract: The present disclosure provides computing systems in which respective quorums of computing nodes securely manage respective secrets associated with cryptographic ledgers according to threshold secret sharing schemes. In particular, membership in the quorums can be changed dynamically and unpredictability to improve security of the quorums against adversarial attacks in which adversaries attempt to compromise or gain control of the computing nodes. More specifically, by changing membership in the quorum dynamically and unpredictability, the ability of the adversary to control at any given time a threshold number of the current members of the quorum and gain access to the secret is dramatically reduced.

公开(公告)号：US20240048366A1

公开(公告)日：2024-02-08

申请号：US18346513

申请日：2023-07-03

Applicant: Google LLC

Inventor： William Douglas Cox ,  Bo Zhu ,  Orest Bolohan ,  Sheldon I. Walfish

IPC: H04L9/08 ,  H04L9/30 ,  H04L9/06

CPC classification number: H04L9/085 ,  H04L9/30 ,  H04L9/0643 ,  H04L9/0637

Abstract: The present disclosure provides computing systems in which respective quorums of computing nodes securely manage respective secrets associated with cryptographic ledgers according to threshold secret sharing schemes. In particular, membership in the quorums can be changed dynamically and unpredictability to improve security of the quorums against adversarial attacks in which adversaries attempt to compromise or gain control of the computing nodes. More specifically, by changing membership in the quorum dynamically and unpredictability, the ability of the adversary to control at any given time a threshold number of the current members of the quorum and gain access to the secret is dramatically reduced.

公开(公告)号：US11258593B1

公开(公告)日：2022-02-22

申请号：US16818356

申请日：2020-03-13

Applicant: Google LLC

Inventor： William Douglas Cox ,  Bo Zhu ,  Orest Bolohan ,  Sheldon I. Walfish

IPC: H04L29/06 ,  H04L9/08 ,  H04L9/30 ,  H04L9/06

Abstract: The present disclosure provides computing systems in which respective quorums of computing nodes securely manage respective secrets associated with cryptographic ledgers according to threshold secret sharing schemes. In particular, membership in the quorums can be changed dynamically and unpredictability to improve security of the quorums against adversarial attacks in which adversaries attempt to compromise or gain control of the computing nodes. More specifically, by changing membership in the quorum dynamically and unpredictability, the ability of the adversary to control at any given time a threshold number of the current members of the quorum and gain access to the secret is dramatically reduced.