In this paper, we propose a blockchain-based computing verification protocol,
called EntrapNet, for distributed shared computing networks, an emerging
underlying network for many internet of things (IoT) applications. EntrapNet
borrows the idea from the practice of entrapment in criminal law to reduce the
possibility of receiving incorrect computing results from trustless service
providers who have offered the computing resources. Furthermore, we
mathematically optimize EntrapNet to deal with the fundamental tradeoff of a
network: security and efficiency. We present an asymptotic optimal solution to
this optimization. It will be seen that EntrapNet can be performed as an
independent and low-cost layer atop any trustless network that requires
outsourced computing, thus making secure computing affordable and practical.

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