If you are a bank IT manager, what would be your advice / best practice on: How to achieve highest security in an e-commerce environment? What dimension to secure your data upon? What are the 3...

If you are a bank IT manager, what would be your advice / best practice on:

1. 
   
   
   
   1. How to achieve highest security in an e-commerce environment?
   
   
   2. What dimension to secure your data upon?
   
   
   3. What are the 3 vulnerable points in an e-commerce environment?
   
   
   4. What are malicious codes that you would be warned and also warn your peers?
      
      (Contemporary trends problems & research – A2)