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Ti-15.4 Stack Collector - Security

Ankit Bhatnagar
Intellectual 650 points
Other Parts Discussed in Thread: SIMPLICITI

Hi,


I am working with TI-15.4 stack to implement a low data rate star topology of sensors with a collector at the center. Going through the collector example, I see there is an option to enable / disable security using.

#define CONFIG_SECURE                true


Would appreciate if someone could clarify the below:

  1. What exactly does security do (Does it encrypt the data sent between the sensors and the collectors) ?
  2. What layer is security working on? (Does it only encrypt the sensor data being passed between the sensor & collector or does it actually encrypt at the radio layer ?

The reason I am asking this is to possibly turn it off to increase the number of sensor nodes that can be connected to the collector than the default 50, as suggested in this thread .

If security is only encrypting sensor data, then as suggested in this thread, I can turn it off and handle encryption in my application layer.

  • 0
    Guru 735695 points
    It supposes to network layer encryption.
  • 0 in reply to YiKai Chen
    Intellectual 650 points
    Hi Chen,

    Thanks for the answer. Can you elaborate on what exactly does it do in Network Layer Encryption? I am bit new to thus stuff so apologies if its a noob question.

    Regards
  • 0 in reply to Ankit Bhatnagar
    TI__Genius 10650 points
    Hi Ankit,

    For your questions:
    What exactly does security do (Does it encrypt the data sent between the sensors and the collectors) ?
    [] Yes, it is used to encrypt data sent between the sensors and collector.


    What layer is security working on? (Does it only encrypt the sensor data being passed between the sensor & collector or does it actually encrypt at the radio layer ?
    [] The security works at MAC Layer. It is implemented as per IEEE 802.15.4 specification. Yes, as suggested in the other post you can turn off the MAC Layer security and encrypt the data on your application to increase the number of supported devices in the network.

    Hope this helps.

    Regards