Hi there, We’re launching the Sign-in Seal feature on the Log-in page of your account to help fight password theft and phishing scams. A Sign-in seal is a secret message or photo that Yahoo! will display on one computer only. You have the option to create a custom seal or text for signing into Yahoo! Search Marketing. The seal is there to tell you that you're seeing a genuine Yahoo! site, not a phishing site. If the seal is not there, it could be a fraudulent page created by a phisher to hijack your account. The seal is cookie-based and linked to one computer (not your Yahoo! ID); so you need one for each computer you use. This is available in the US market only. For more details read our Yahoo! Search Marketing blog post: http://www.ysmblog.com/blog/2008/02/07/sign-in-seal/ Thanks for your feedback! My best, YahooPete
This is also what most banks are using to verify bank sites too. Works great as long as you remember image details....lol