Yahoo! now submits your ID and password securely via SSL (Secure Sockets Layer) encryption. This means that your personal information is more secure every time you sign in.
In the past, Yahoo! used a challenge-response mechanism to protect passwords using MD5. Passwords were scrambled using a one-way hash, so that they could not be converted to clear text.
Protecting your privacy and information online is extremely important to Yahoo!. We are constantly evaluating our security technologies to ensure we are taking reasonable steps to protect your personal information. As industry standards evolve, we evaluate them for reliability and scalability prior to implementation. As a result, Yahoo! is now able to offer reliable SSL submission of ID and password to anyone with an SSL-enabled browser.
Yahoo! takes your security seriously. For more information about how to protect yourself online, see the Yahoo! Security Center.