One of the key benefits of using SIM authentication is that it utilizes the 802.1x technology, which is a standard method for encrypting user credentials and user data in the Wi-Fi session.

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He refused even to begin the authentication process by pressing any key on his phone.

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Those innocuous traits led investigators to initially believe the computer access from China using Bob's credentials was unauthorized -- and that some form of malware was sidestepping strong two-factor authentication that included a token RSA key fob under Bob's name.

CNN: STORY HIGHLIGHTS

Encourage and develop better authentication systems, including PKI (public key infrastructure) and CA (certificate authority) schemes.

CNN: Global panel issues Internet security recommendations