In an effort to curb the influx of phishing scams that attempt to fool users into logging onto a illegitimate Web site, Yahoo is now enabling its users to customize their sign in box with a personal seal. The idea is that users would spot the graphic and know they are truly on Yahoo and not some malicious site.
A number of banks including Bank of America have taken a similar approach with their authentication methods. Yahoo users can either upload an image or select a line of text that would appear only to them. However, because the feature utilizes cookies, it does not work on public computers and deleting the cookie would reset the login box to normal.