Abstract: A network security system and methodology that securely defenses against current and future threats. According to the invention, anti-phishing method is utilized for protecting a computer system. In one embodiment of the invention, anti-phishing method comprises the steps of: detecting a user being submitting predetermined data to a predetermined website; intercepting the predetermined data; verifying whether address of the predetermined website is identical to an address of a secured website; and enabling and/or disabling the submission of the predetermined data.