I read http://csrc.nist.gov/publications/drafts/800-121/sp800_121_r2_draft.pdf and https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=286439. but I can not find there information about Bluetooth Security Mode 2.
I know that:
- Low energy Security Mode 2 has multiple levels associated with data signing. Data signing provides strong data integrity but not confidentiality.
- Level 1 requires unauthenticated pairing with data signing. Level 2 requires authenticated pairing with data signing.
But there should be some pairing first, before data signing can be used, right? The problem is, if the pairing looks like in Mode 1, or its a different procedure?