Providing security to website

Question

HI,

I want to provide security to my website like

1. If he use back button then i need to expire the session

2. If he edietd the session then also i need to abandon the session

3. IF he entered other site url rather than my domain name i need to abandon the session 

 

How can i do this can anyone help me regarding this.

 

Thanks,

 

Manoj