  Social networks, instant messages and file sharing systems are common
communication means among friends, families, coworkers, etc. Due to concerns of
personal privacy, identify thefts, data misuse, freedom of speech and
government surveillance, online social or communication networks have provided
various options for a user to guard or control his or her personal data.
However, for most these services, user data are still accessible by the service
providers, which can lead to both liability issues if data breach occurs at the
server side and data misuse by the network administrators. To prevent service
providers from accessing user data, secure end-to-end user communication is a
must, like the one provided by WhatsApp. On the other hand, the services
provided by such communication network can still be interfered by an authority.
For a communication network to be stealthy, the following features are
essential: (1) oblivious service, (2) complete user control and flexibility,
and (3) lightweight. In this paper, we first discuss the features and benefits
of a stealth communication network (SNET), and then we propose a theoretical
framework that can be adopted to implement an SNET. By utilizing the framework
and the existing publicly available cloud storage, we present the
implementation details of an instance of SNET, named Secret-Share. Last but not
least, we discuss the current limitations of Secret-Share and its potential
extensions.
