I have 2 questions about LE Secure Connections.

I have 2 questions about LE Secure Connections.

1. What are the decisions of PKa and PKb passed in "2.3.5.6.1 Public Key Exchange" of BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part H]?

2. Is "2.3.5.6.2 Authentication Stage 1 - Just Works or Numeric Comparison" of BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part H] not encrypted?
Also, from what stage will it be encrypted?

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  • Hi, 

    1. What do you mean by "What are the decisions" ? The PKa, PKb are the public keys generated by each peer and to be exchanged so they can use the keys to generate DHKey. The DHKey then will be used to generate LTK key. 

    2. Authentication Stage 1 is not encrypted. The link is encrypted right after the DH key check at Authentication Stage 2 (2.3.4.6.5). Please have a look here.

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