Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you are responsible for maintaining the confidentiality of your account and password and for restricting access to your device . 

```
. OPTIONS: ['Contract by using' 'Choice of law' 'Jurisdiction'
 'Limitation of liability' 'Arbitration' 'Content removal' 'None'
 'Unilateral termination' 'Unilateral change'].