Terminal matching method and apparatus

Patent metadata

Field	Value
Publication number	US-11824892-B2
Application number	US-202117459858-A
Country	US
Kind code	B2
Filing date	Aug 27, 2021
Priority date	Dec 31, 2016
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

A method includes: obtaining, by a second terminal, an interface address of a first terminal, where the interface address of the first terminal is MAC1; receiving, by the second terminal, a first message sent by the first terminal, where an interface address of the first terminal in the first message is MAC3 obtained after a change, and the first message includes first identification information; and comparing, by the second terminal, the first identification information with second identification information, and if the first identification information is consistent with the second identification information, determining, by the second terminal, that the MAC3 in the first message and the MAC1 that is obtained by the second terminal are used to identify a same device, where the same device is the first terminal.

First claim

What is claimed is:

1. A method comprising:
obtaining, by a second terminal, an interface address of a first terminal at a first time point, wherein the interface address of the first terminal at the first time point is a first media access control address MAC 1 , and an interface address of the second terminal at the first time point is a second media access control address MAC 2 ;
receiving, by the second terminal at a second time point following the first time point, a first message sent by the first terminal, wherein a transmitter address comprised in the first message is a third media access control address MAC 3 obtained after a change, the first message comprises first identification information, the first identification information is information obtained through calculation after the first terminal inputs the MAC 1 , the MAC 2 and secret information into a first preset irreversible algorithm, and the secret information is information shared by the first terminal and the second terminal;
determining, by the second terminal based on the first identification information, whether the MAC 1 of the first terminal at the first time point and the MAC 3 received from the first terminal at the second time point identify a same device;
sending, by the second terminal to the first terminal, a response message for the first message, the response message carrying third identification information, wherein the third identification information is information obtained through calculation after the second terminal inputs the MAC 1 , the MAC 2 and the secret information into a second preset irreversible algorithm, wherein the response message for the first message comprises a fourth media access control address MAC 4 ;
after sending, by the second terminal, the response message, receiving, by the second terminal, a second message sent by the first terminal, wherein the second message comprises a confirmation indication indicating that the first terminal determines that the MAC 4 is the interface address of the second terminal; and
sending, by the second terminal, a response message for the second message to the first terminal when the second message comprises the confirmation indication.

2. The method according to claim 1 , wherein
when the second terminal is a destination device, and the response message for the first message is a data frame, a subtype field of the data frame is set to an anti-tracking data frame, and the third identification information is added to an A4 field of the data frame.

3. The method according to claim 1 , wherein after obtaining, by the second terminal, the interface address of the first terminal at the first time point, the method further comprises:
detecting, by the second terminal, whether the MAC 1 conflicts with a media access control address within a communication range of the second terminal, and when the second terminal detects a conflict of the MAC 1 , sending a third message to the first terminal, wherein the third message carries a MAC address conflict indication.

4. The method according to claim 3 , wherein
the first message, the second message or the third message is a management frame, the first identification information or the third identification information is added to an anti-tracking information element of a load part in the management frame, and the anti-tracking information element comprises an element identifier and the first or third identification information; or
the first message, the second message, or the third message is a management frame or a control frame, a subtype field of the management frame or the control frame indicates that the management frame or the control frame is a frame of an anti-tracking type, and the first identification information or the third identification information is added to a load part of the management frame or the control frame.

5. The method according to claim 1 , wherein
when the first terminal is a source device, the first message is a data frame, and a subtype field of the data frame indicates that the data frame is an anti-tracking data frame, the first identification information is added to an A3 field of the data frame.

6. The method according to claim 1 , wherein the method further comprises:
comparing, by the second terminal, the first identification information with second identification information, and when the first identification information is consistent with the second identification information, determining, by the second terminal, that the MAC 3 in the first message and the MAC 1 that is obtained by the second terminal identify the same device, wherein the same device is the first terminal, and the second identification information is information obtained through calculation after the second terminal inputs the MAC 1 , the MAC 2 , and the secret information into the first preset irreversible algorithm.

7. The method according to claim 1 , wherein the change is that a MAC address of the first terminal switches from the MAC 1 to the MAC 3 .

8. The method according to claim 1 , further comprising:
obtaining the secret information by truncating a key that is shared by the first terminal and the second terminal.

9. A second terminal comprising one or more processors, a wireless transceiver, a memory and a bus, wherein the one or more processors, the wireless transceiver, and the memory are connected to each other by using the bus;
wherein the one or more processors are configured to obtain an interface address of a first terminal at a first time point, wherein the interface address of the first terminal is a first media access control address MAC 1 , and an interface address of the second terminal at the first time point is a second media access control address MAC 2 ;
wherein the transceiver is configured to receive, at a second time point following the first time point, a first message sent by the first terminal, wherein a transmitter address comprised in the first message is a third media access control address MAC 3 obtained after a change, the first message comprises first identification information, the first identification information is information obtained through calculation after the first terminal inputs the MAC 1 , the MAC 2 and secret information into a first preset irreversible algorithm, and the secret information is information shared by the first terminal and the second terminal;
wherein the one or more processors are further configured to determine, based on the first identification information, whether the MAC 1 of the first terminal at the first time point and the MAC 3 received from the first terminal at the second time point identify a same device;
wherein the transceiver is further configured to send a response message for the first message to the first terminal, the response message for the first message carrying third identification information, wherein the third identification information is information obtained through calculation after the second terminal inputs the MAC 1 , the MAC 2 and the secret information into a second preset irreversible algorithm, and the response message for the first message comprises a fourth media access control address MAC 4 ; and
wherein the transceiver is further configured to:
receive a second message sent by the first terminal, wherein the second message comprises a confirmation indication that the first terminal determines that the MAC 4 is the interface address of the second terminal; and
send a response message for the second message to the first terminal when the second message comprises the confirmation indication.

10. The second terminal according to claim 9 , wherein
the one or more processors are further configured to: when the

Assignees

• Huawei Tech Co Ltd

Inventors

• Li Xiaoxian
• Fang Ping

Classifications

• H04L63/1475 Primary

  Passive attacks, e.g. eavesdropping or listening without modification of the traffic monitored · CPC title

• H04W12/108

  Source integrity · CPC title

• H04W12/121

  Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS] · CPC title

• H04W12/71

  Hardware identity · CPC title

• H04W12/02

  Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII] · CPC title