text: abstract—this paper describes the design and development of
  a decentralized firewall system powered by a novel malware detection engine. the firewall is built using blockchain technology.
  the detection engine aims to classify portable executable (pe)
  files as malicious or benign. file classification is carried out using
  a deep belief neural network (dbn) as the detection engine. our
  approach is to model the files as grayscale images and use the
  dbn to classify those images into the aforementioned two classes.
  an extensive data set of 10,000 files is used to train the dbn.
  validation is carried out using 4,000 files previously unexposed
  to the network. the final result of whether to allow or block a
  file is obtained by arriving at a proof of work based consensus
  in the blockchain network.
  index terms—malware, blockchain consensus, portable executable, deep belief network, restricted boltzmann machine