My Wallet on Blockchain supports various forms of two-factor authentication. This tutorial is for SMS.
1. Log in to your MyWallet account on the Welcome Screen click “Account Details” and then “Security.”
2. Choose SMS from the two-factor authentication select box.
3. At next login an authentication code will be sent to you.
For more information visit: https://blockchain.info/wallet/yubikey; https://blockchain.info/wallet/sms-two-factor; and https://blockchain.info/wallet/google-authenticator.
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