a smartphone) that is attempting to access a data value (a “characteristic”) on a Peripheral device that requires authenticated access. This process is triggered by a Central device (e.g. When two devices, which initially do not have security, wish to do something that requires security, the devices must first pair. Note that each connection starts its lifetime in Security Mode 1, Level 1. The required security mode/level of a connection may change from time to time, leading to procedures to increase that level. OverviewĪ BLE connection is said to operate at a specific security mode for which there are several security levels. If you are not already familiar with BLE, I suggest you to watch this nice webinar by Nordic Semiconductor before. In this post, I will try to provide a basic overview of BLE security features. As a consequence, IoT devices makers looking to integrate BLE into their products should be aware of the security features and limitations of this technology. Likewise, it is also becoming more commonly used in applications where sensitive information is being transferred. Bluetooth Low Energy (BLE) is becoming one of the most common wireless standards used today in IoT devices.
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