The Need for More than Just a User ID and Password
Cases have been reported of user IDs and passwords being stolen by fraudsters through phishing emails, fraudulent websites and malwares. This shows the need to use additional tools to increase the security of Internet banking.
Different banks may offer different types of two-factor authentication methods to customers. Two-factor authentication uses a combination of two different factors for verifying a user's identity. Below is one of the common examples:

Three common types of two-factor authentication currently being adopted by banks are:
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Security Token-based One-time Password (OTP)
An OTP generated by a security device/token. Each OTP is used only once and expires within a short period of time.
- How it works - You press the button on the security device/token to obtain an OTP, which is used as the additional identity authentication, e.g. to confirm a high-risk transaction.

User types in token-based OTP to confirm high-risk transactions
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SMS-based One-time Password (OTP)
An SMS-based OTP generated by the bank and sent to your mobile phone for additional identity authentication. Each SMS OTP is used only once and expires within a short period of time.
- How it works - When you initiate a high-risk transaction, you will receive an SMS OTP on your mobile phone. You then type in the OTP to confirm the transaction.
User types in SMS OTP to confirm high-risk transactions
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Digital Certificate
An electronic identification certificate that helps establish your identity online. It can be stored in a smart card (e.g. the Hong Kong Smart ID card) or an electronic key (e.g. USB key).
- How it works - You insert the smart card or key into a smart card reader or a USB port of a PC during the authentication process.
User inserts Hong Kong Smart ID card into a smart card reader and types in digital certificate password to confirm high-risk transactions