what-when-how
In Depth Tutorials and Information
10.5 Privacy Preserving in Collaborative STNs..............................................265
10.5.1 Privacy Problem 1 .....................................................................265
10.5.1.1 Protocol Definitions ................................................ 266
10.5.2 Privacy Problem 2: Network Updating Issues ...........................267
10.5.2.1 Collaborative Social Network Revocation
Protocol ....................................................................267
10.5.2.2 Collaborative Social Network Searching Protocol ... 268
10.6 Conclusions............................................................................................269
References .........................................................................................................269
10.1 Introduction
Sociotechnical networks (STN) have been becoming prevalent in many appli-
cations (see previous chapters on different applications). However, information
sharing in the STNs also results in the vulnerabilities and difficulties in privacy
preservation. A malicious person can easily take advantage of the public profiles
and friendships to exploit the private information of the target such as locations,
transaction records, and identities. hus, it is necessary to provide appropri-
ate privacy policies or algorithms to limit the information leakage as well as to
ensure the stability in keeping the dataflow among users and maintaining the
accessibility.
Today, cloud computing [20] has become an important physical infrastructure
to support STN. Cloud computing is the evolution of grid computing. It maps real
user applications to different virtual resources. FigureĀ 10.1 shows an example sce-
nario of cloud computing. When a user issues resources dispatch commands to the
cloud computing core, a series of virtual resource connections will be mapped to
User Access
Attackers
Users
Cluster N
Cluster 1
Other Clusters
Figure10.1
Cloudcomputingarchitecture(example).
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