Systems and methods for short range wireless data transfer
Systems and methods for application level authentication are provided for use with the low energy Bluetooth device and accessory. This includes receiving accessory credentials from a server, establishing a Bluetooth low energy connection with the accessory, authenticating with the accessory, and lastly transferring data to the accessory. The transferring of the data may be either a bulk transfer, or a data stream. The authenticating may be an application layer authentication between a device and the accessory using a shared secret key and using a hash function. Additional embodiments include methods for over-the-air firmware updates, and device control of a low energy Bluetooth accessory.
1. A method for authenticated data transfer between a low energy short range wireless device and an accessory associated with a user of the accessory, the method comprising:
establishing a network connection between the low energy short range wireless device and a server;
accessing account information associated with the user, where the account information is stored in a database accessible by the server, the account information including accessory credentials;
receiving, by the low energy short range wireless device, the accessory credentials from the server via the network connection;
establishing a short range wireless low energy connection between the low energy short range wireless device and the accessory;
authenticating with the accessory using the accessory credentials of the user account information;
transferring data from the low energy short range wireless device to the accessory after authenticating with the accessory; and
the low energy short range wireless device:
requesting the accessory to verify the transferred data; and
sending a message to the accessory to disconnect from the low energy short range wireless device and reset,
where the accessory credentials comprise a device identifier of the accessory and an authentication key.
2. The method of claim 1 , wherein an application on the device receives the accessory credentials and authenticates with the accessory without the device operating system's involvement.
3. The method of claim 1 , further comprising defining a file transfer control message for the device to get and put data from and to the accessory.
4. The method of claim 3 , further comprising defining separate channels for communicating file transfer control messages and transfer data.
5. The method of claim 3 , further comprising specifying the length of a get or put operation.
6. The method of claim 1 , wherein the transferring data is a streaming transfer.
7. The method of claim 6 , further comprising the low energy short range wireless device requesting the accessory to verify the transferred data for completion and correctness.
8. The method of claim 1 , wherein the authenticating is an application layer authentication between the device and the accessory using a shared secret key and using a hash function.