Hi, I am interested in the security field of IoT applications. I read this article about 'BLE security levels and modes' and I am wondering what is the mode and level that estimote beacons uses?
LE Security Modes and Levels
LE security modes are similar to BR/EDR service-level security modes (i.e., Security Modes 2 and 4) in that each service can have its own security requirements. However, Bluetooth LE also specifies that each service request can have its own security requirements as well. A device enforces the service-related security requirements by following the appropriate security mode and level.
1- LE Security Mode 1 has multiple levels associated with encryption. Level 1 specifies no security, meaning no authentication and no encryption will be initiated. Level 2 requires unauthenticated pairing with encryption. Level 3 requires authenticated pairing with encryption.
2- LE 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.
If a particular service request and the associated service have different security modes and/or levels, the stronger security requirements prevail. For example, if either requires Security Mode 1 Level 3, then the requirements for Security Mode 1 Level 3 are enforced.
Because Security Mode 1 Level 3 requires authenticated pairing and encryption, NIST considers this the most secure of these modes/levels and strongly recommends its use for all LE connections. Security Mode 1 Level 1 is the least secure and should never be used. Also, because Security Mode 2 does not provide encryption, Security Mode 1 Level 3 is strongly preferred over Security Mode 2.