What is SSL, and does Yahoo! Mail offer it?
Whenever you sign in to a Yahoo! service, your sign in information is protected by SSL (Secure Socket Layers) encryption. SSL is an industry standard for encrypting private data as it is sent over the internet. You can tell that SSL is being used when the web address you're visiting begins with HTTPS:// (Hypertext Transfer Protocol Secure). By using a connection with advanced security features, you can be more confident that your account is safer from hackers, and your private information is less likely to fall into someone else’s hands.
Once you are past the sign in screen, and in your Yahoo! Mail account, SSL is used only if you have turned it on in the Mail Options menu. Learn how to turn on SSL in your Yahoo! Mail account.
Please note: Your internet browser must support SSL in order for it to be used when you visit Yahoo! Mail. Note, also, that pages may take longer to download with SSL encryption.
SSL and the Yahoo! Mail Apps for Android, iOS, and Windows 8
If you access Yahoo! Mail using one of our apps, your account is automatically protected by SSL.