Cyber physical security has been used widely in many areas for instance business, marketing, education, medical and transportation. Security aspect plays a major role and change into challenging issue. The organizations should readily set up the security aspects referring to various increased numbers of potential attacks like Phishing, Spam, Spyware and Malwares (Trojans, Worm and Virus). It is significant to have exact countermeasures that could reduce the cyber physical attacks, especially in banking data center that stores a huge amount of customer data. It is also vulnerable to attacks, including physical or operational attacks. Existing banking security protection and defense mechanism for security of customer authentication in banking are either complete physical (bank card, bank book, etc.), or completely cyber (firewall, encryption, etc.). In this paper, we surveyed some of the existing authentication techniques in real online banking systems and propose an alternative cyber-physical security, defense for customer authentication in online banking that immune to attacks.