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:
Mar. 02, 2021
Filed:
Sep. 14, 2017
Nec Europe Ltd., Heidelberg, DE;
Hien Truong, Heidelberg, DE;
NEC CORPORATION, Tokyo, JP;
Abstract
A method of multi-factor authentication includes receiving, by a remote hosting server from a terminal, a request from a user possessing a trusted device to access a remote service. The remote hosting server generates challenge chirp signal information and sends the challenge chirp signal information to the terminal and the device. Measurements are received of a room impulse response taken by each of the terminal and the trusted device using the chirp signal information. It is checked whether a location of the terminal is known based on a measurement of the room impulse response. The measurements of the room impulse response of the terminal and the trusted device are compared. A level of access to the remote service is granted to the user based on whether the location of the terminal is known and whether the trusted device is present at the location of the terminal.