Abstract
The master-key is used to encrypt the operation-key, and the operation-key is applied to encrypt the transport-key, consequently safety protection of the master-key is security core in online banking system. A scheme to protect the master-key was presented. Using method of 3-out-4 key share and LaGrange formula, the shares of the master-key were distributed to one synthesizing card and four key servers. When the data centre web server needed the master-key, the synthesizing card firstly authenticated the legitimacy of the shares of randomly selected three key severs from the four by zero-knowledge proof technology, once the shares were modified and destroyed, rest shares could make up a group so that the system worked continuously. Then the synthesizing card synthesized the master-key based on the shares of those three key severs. Security analysis proves that this scheme makes the whole system to have fault-tolerant and error detection, and also shows no-information leakage and defending collusive attack.
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Lai-Cheng, C., Lei, L. (2010). A New Scheme for Protecting Master-Key of Data Centre Web Server in Online Banking. In: Wang, F.L., Gong, Z., Luo, X., Lei, J. (eds) Web Information Systems and Mining. WISM 2010. Lecture Notes in Computer Science, vol 6318. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16515-3_23
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DOI: https://doi.org/10.1007/978-3-642-16515-3_23
Publisher Name: Springer, Berlin, Heidelberg
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