The security of the key algorithm.
| Level | Description | 
|---|---|
| 1 | Basic security (AES-128 equivalent) | 
| 2 | Moderate security (SHA-256 equivalent) | 
| 3 | High security (AES-192 equivalent) | 
| 4 | Very high security (SHA-384 equivalent) | 
| 5 | Highest security (AES-256 equivalent) |