The Security Center was designed to simplify the process of protecting your wallet. The first step is to make sure you verify your email address. Once you sign up for a Blockchain wallet, you should receive an email from firstname.lastname@example.org with the subject Please Verify Your Email Address. You can verify your email by clicking the button within the email, or you can verify your email later from within the Security Center. There, you can request a verification code to be sent to your email, or you can change the email address associated with your wallet. If you haven't verified your email, click on Send Code.
You should receive an email from email@example.com with the subject Blockchain Wallet Confirmation Code. It will contain a code that you can copy and paste or simply enter into the field back in your wallet. Once you’ve entered the code, press Verify Code. If you didn’t receive the email, press Resend Email.
Once you have verified your email, it will be used to authorize logins, send payment notifications, and notify you of wallet updates. Whenever you log into your wallet from a different device or IP address, you'll be prompted to verify the login via a verification email.If you ever need to change your email address, simply go back to the Security Center and click on Change Email. Please note that it will not change the email address you use to buy or sell.
Next Step: Two-Step Verification.