SECURE WIRELESS CHARGING

• US 20150071444A1
• Filed: 11/13/2014
• Published: 03/12/2015
• Est. Priority Date: 01/07/2013
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Knubben, Wihelmus H. C., Brink, Klaas, Sedzin, Aliaksei Vladimirovich, van Lammeren, Johannes Petrus Maria
• Granted Patent: US 9,203,260 B2
• Time in Patent Office: Days
• US Class Current: 380/270
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/32 including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• CPC Class Codes: H04W 12/03 Protecting confidentiality, e.g. by encryption
• CPC Class Codes: H04W 12/06 Authentication

Abstract

A wireless charging apparatus and method utilizing a secure element is disclosed. Illustratively, a receiver containing a secure element securely communicates with a charging pad also equipped with a secure element. The communication can be used to establish the identity of the receiver and facilitate billing for the wireless charging. The charging pad may further communicate in a secure manner with a server to authenticate the identity and other information about the receiver before providing wireless charging. Direct communication between the receiver and server is also contemplated.

Claims

1. A method for wirelessly charging a receiver at a charging pad, the method at the charging pad comprising:

implementing an authentication procedure between the charging pad and a receiver via an NFC communications channel;

if the authentication procedure is successful between the charging pad and the receiver via the NFC communication channel, receiving a first encrypted token from the receiver;

decrypting the first encrypted token and storing as the first token;

sending a second encrypted token to a server, wherein the second encrypted token includes an encrypted version of the first token and information about the charging pad;

receiving an encrypted response from the server in response to sending the second encrypted token;

decrypting the response from the server to determine that charging of the receiver is appropriate; and

commencing wireless charging of the receiver if it is determined from the decrypted response that charging of the receiver is appropriate.

2. The method of claim 1, wherein the second encrypted token includes information about the location of the charging pad.

3. The method of claim 1, wherein the second encrypted token includes information about the identity of the charging pad.

4. The method of claim 1, wherein the second encrypted token includes information about payment for the charging.

5. The method of claim 1, wherein once it has been determined from the decrypted response that charging of the receiver is appropriate, supporting further secure communication between the receiver and the server via the charging pad.

6. The method of claim 1, further comprising receiving secure encrypted communication from the receiver at the charging pad via the NFC communications channel, the secure encrypted communication including an identification of the registered owner of the receiver.

7. The method of claim 1, further comprising encrypting the identification of the registered owner of the receiver including the encrypted identification in the second encrypted token.

8. The method of claim 1, further comprising receiving secure encrypted communication from the receiver at the charging pad via the NFC communications channel, the secure encrypted communication including a standard by which the receiver must be charged.

9. The method of claim 1, further comprising encrypting the standard by the which the receiver must be charged in the second encrypted token.

10. The method of claim 1, further comprising receiving secure encrypted communication from the receiver at the charging pad via the NFC communications channel, the secure encrypted communication including data related to payment for the charging.

11. The method of claim 1, further comprising encrypting the data related to payment for the charging in the second encrypted token.

12. A charging pad for wirelessly charging a receiver, the charging pad comprising:

a controller;

a secure element; and

an NFC communications module;

wherein the controller, secure element, and NFC communication module are configured to;

implement an authentication procedure between the charging pad and a receiver via an NFC communications channel;

if the authentication procedure is successful between the charging pad and the receiver via the NFC communication channel, receive a first encryption token from the receiver;

decrypt the first encrypted token and store as the first token;

send a second encrypted token to a server, wherein the second encrypted token includes an encrypted version of the first token and information about the charging pad;

receive an encrypted response from the server in response to sending the second encrypted token;

decrypt the response from the server to determine that charging of the receiver is appropriate; and

commence wireless charging of the receiver if it is determined from the decrypted response that charging of the receiver is appropriate.

13. The charging pad of claim 12, wherein the second encrypted token includes information about the location of the charging pad.

14. The charging pad of claim 12, wherein the second encrypted token includes information about the identity of the charging pad.

15. The charging pad of claim 12, wherein the second encrypted token includes information about payment for the charging.