As the wireless communication increasing so there are new type of attacks are being seen. one of them is Phishing attack. An end-host based anti-phishing algorithm which is called as Link Guard, based on the characteristics of the phishing hyperlink. Since Link Guard is character-based, it can detect and prevent not only known phishing attacks but also unknown ones. The spoofed e-mails used by phishers are one type of spam e-mails. From this point of view, the spam filters can also be used to filter those phishing e-mails. For example, blacklist, white list, keyword filters, Bayesian filters with self learning abilities, and E-Mail Stamp, etc., can all be used at the e-mail server or client systems. Most of these anti-spam techniques perform filtering at the receiving side by scanning the contents and the address of the received e-mails. The experiments indicate that Link Guard is light-weighted in that it consumes very little memory and CPU circles, and most importantly, it is very...