Wearable communication devices for secured transaction and communication

1. A wearable device for capacitive coupled communications, the wearable device comprising:

capacitive sensor transceiver circuitry configured to receive a capacitive coupled signal from a host device, wherein the capacitive coupled signal is received through a body of a user of the wearable device and is modulated to include a request for authentication data including encrypted identification information identifying the wearable device to authenticate the wearable device with the host device, and wherein the capacitive coupled signal is an electrical signal; and

processing circuitry in communication with the capacitive sensor transceiver circuitry to process the received capacitive coupled signal, and transmit, by the wearable device, authentication data, stored in a memory of the wearable device, comprising encrypted identification information and password information modulated on a capacitive coupled reply signal to the host device,

wherein the capacitive coupled reply signal modulated with the authentication data is transmitted through the body of the user of the wearable device, wherein the capacitive sensor transceiver circuitry is configured to receive another capacitive coupled signal from the host device modulated with information including a confirmation indicating a successful authentication of the wearable device with the host device and indicating that the host device is ready for operation, and

wherein in response to the received confirmation, the processing circuitry causes the wearable device to stop transmitting the authentication data.

2. The wearable device of claim 1 , wherein:

the capacitive sensor transceiver circuitry is configured to communicate, using capacitive coupled signaling, with a point of sales (POS) terminal to process a transaction.

3. The wearable device of claim 1 , comprising:

a display screen to present information to the user.

4. The wearable device of claim 1 , wherein:

the wearable device is a smartwatch worn on a wrist of the user.

5. The wearable device of claim 1 , wherein:

the wearable device is attached to a belt worn by the user.

6. The wearable device of claim 1 , wherein:

the wearable device is included in a shoe worn by the user.

7. The wearable device of claim 1 , wherein:

the wearable device is included in an article which is attached to the user.

8. The wearable device of claim 1 , comprising:

at least one other sensor configured to collect sensor data.

9. The wearable device of claim 8 , wherein:

the at least one other sensor is configured to measure a biological parameter of the user.

10. The wearable device of claim 9 , wherein:

the biological parameter of the user includes a temperature of the user.

11. The wearable device of claim 9 , wherein:

the biological parameter of the user includes a blood pressure of the user.

12. The wearable device of claim 9 , wherein:

the biological parameter of the user includes a body pulse rate of the user.

13. The wearable device of claim 89 , wherein:

the at least one other sensor is configured to measure a motion parameter of the user.

14. A method performed by a wearable device for capacitive coupled communications, the method includes:

detecting, by the wearable device, a signal sent from a host device through a user's body using a capacitive coupling channel, the received signal modulated with a request to authenticate the wearable device with the host device, wherein the signal is an electrical signal;

responsive to detecting the signal sent from the host device, transmitting, by the wearable device, a reply signal modulated with authentication data that includes encrypted identification information stored in memory of the wearable device identifying the wearable device and password information stored in memory of the wearable device to authenticate the wearable device at the host device, wherein the reply signal is transmitted through the user's body using capacitive coupling; and

receiving, by the wearable device, a confirmation signal from the host device modulated with information confirming a successful authentication of the wearable device with the host device and indicating that the host device is ready for operation, and wherein in response to the received confirmation, the wearable device stops transmitting the authentication data.

15. The method of claim 14 , comprising:

responsive to receiving the confirmation signal, stopping, by the wearable device, transmission of the authentication data.

16. The method of claim 14 , comprising:

communicating, using capacitive coupled signaling, with a point of sales (POS) terminal to process a transaction.

17. The method of claim 16 , wherein communicating, using capacitive coupled signaling, with a point of sales (POS) terminal to process a transaction includes sending authentication information to the POS terminal for verification.

18. The method of claim 16 , wherein communicating, using capacitive coupled signaling, with a point of sales (POS) terminal to process a transaction includes:

receiving, by the wearable device, confirmation from the POS terminal indicating a successful verification of the authentication information.

19. The method of claim 16 , comprising:

receiving from the host device an authorization for the wearable device to spend up to a certain amount of money.

20. The wearable device of claim 1 , wherein:

the capacitive coupled signal has a frequency between one kilohertz and 500 kilohertz.