{"id":157430,"date":"2009-04-23T00:00:00","date_gmt":"2009-04-23T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/tunneled-tls-for-multi-factor-authentication\/"},"modified":"2018-10-16T21:56:50","modified_gmt":"2018-10-17T04:56:50","slug":"tunneled-tls-for-multi-factor-authentication","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/tunneled-tls-for-multi-factor-authentication\/","title":{"rendered":"Tunneled TLS for Multi-Factor Authentication"},"content":{"rendered":"<div class=\"asset-content\">\n<p>When logging onto a remote server from a distrusted terminal, one can leak secrets such as passwords and account data to various forms of malware. To address this problem, we take an existing approach of using a trusted personal device as the interface available to users for entering their login credentials. In our proposal, such a device would send the credentials to a server using a tunneled TLS session routed via a distrusted terminal. The tunneling would be done within an existing TLS session established between the terminal&#8217;s browser and the server. Upon validating the credentials, the server would enable the terminal to access the user account. Consequently, the terminal would never see in plain-text the login credentials. We show that the proposed protocol resists arbitrary key-loggers, phishing agents, cross-site scripting, and invasive virtual machines. As a powerful and surprising application, if the distrusted terminal is at a point-of-sale, the trusted device could use our protocol to execute a payment with it. The user experience for this payment engine is similar to a payment with a traditional credit card.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When logging onto a remote server from a distrusted terminal, one can leak secrets such as passwords and account data to various forms of malware. To address this problem, we take an existing approach of using a trusted personal device as the interface available to users for entering their login credentials. 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