April 2017
Intermediate to advanced
242 pages
6h 10m
English
Content preview from Building Bluetooth Low Energy Systems
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Key Generation
Key generation is a process done while a device wants to pair with another device. The process is independent of any other LE device. The reason to generate a key and pair the device with another device are:
- Securing device identity
- Authentication of the unencrypted data.
- Confidentiality
For key generation purposes the devices exchange required information and then the Short Term Key (STK) is calculated. The link is then encrypted used AES-CCM cryptography. While the key generation is not performed on the controller, the actual encryption is performed on the controller.
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