6 Communication Security Modes
Communication between the device and host operates in three basic modes:
- Standard mode — Default mode for the device after power-up
- Authentication mode — Activated by a successful authentication sequence
- Encryption mode — Activated by a successful encryption activation following a successful authentication
Data transferred to and from the device is handled as shown in the following table.
Mode |
Configuration Data |
User Data |
Passwords |
Data Integrity Check |
---|---|---|---|---|
Standard/Password |
Clear |
Clear |
Clear |
MDC |
Authentication |
Clear |
Clear |
Encrypted |
MAC |
Encryption |
Clear |
Encrypted |
Encrypted |
MAC |
Note: Configuration data includes the entire configuration memory
except for the passwords.
- MDC: Modification Detection Code
- MAC: Message Authentication Code