| 摘要 |
A two-factor authentication system is provided for securing online transactions. In the two-factor authentication system, a transaction server provides online transaction services. A mobile communication device receives short messages. A client computing device applies a first authentication function to communicate with the transaction server, receives, via short messages, a first authentication code used to authenticate the transaction server, and applies a second authentication function to generate a second authentication code. Next, the transaction server authenticates the client computing device with the second authentication function and second authentication code.
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