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Secure Group Communication Scheme Based on Linear Geometry

Author: LiangYuJun
Tutor: TangShaoHua
School: South China University of Technology
Course: Computer Software and Theory
Keywords: Key Management Group communication Linear Geometry Access Control
CLC: TP393.08
Type: Master's thesis
Year: 2011
Downloads: 7
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Abstract


Secure group communication is the basis of many commercial applications, such as video broadcasting, web conferencing, information distribution, online games and other interactive applications. Key management scheme for secure group communication, but to solve the security group communication group communication demanding requirements of security as well as the complexity of group communication environment, a good key management method so far has not a variety of issues. To make group communication can better serve the application, there must be a better key management scheme to solve the problem of group communication security. Based linear geometry of nature, a new security group communication key management scheme based on this proposed level access control security group communication key management scheme, respectively, on the program's core algorithm The experimental test results showed that the two programs can be a good control of the computation and storage overhead, has good usability and scalability. The linear geometry Security group communication key management solutions basic principle is that each member association to confidentiality vector in a vector space, the group controller calculates a center vector and publicly, the center vector and a confidentiality vector inner product are equal, the inner product is the group key. The security of the scheme is that unauthorized users can not know the vectors of confidentiality, will not be able to solve the key center vector. Each sub-program gives basic and optimization of the two models, the program's client computing and storage overhead from the group scale affect the basic principles of key management scheme with hierarchical access control, especially suitable client computing resource-constrained group controller and the central controller shared two confidentiality vector, the central controller calculates a set of public vectors, each sub-group corresponds to a private vector, first a confidential disclosure vector of the vector and the corresponding sub-groups within the product is Sub-groups of the group key; Let E open vector inner product corresponding to the confidentiality of the sub-group of a first vector and the sub-group b: (1) if the inner product is zero, then a unsolvable subgroups b group key. (2) If the inner product is not 0, i.e., a can be deduced through the second confidential vector B of the group key. Finally, combine the two programs, the design and implementation of a prototype system, and performance testing for different scale groups.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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