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Sallal, M., Owenson, G., Adda, M..  2020.  Evaluation of Security and Performance of Master Node Protocol in the Bitcoin Peer-to-Peer Network. 2020 IEEE International Conference on Blockchain and Cryptocurrency (ICBC). :1—3.

The mechanism of peers randomly choosing logical neighbors without any knowledge about underlying physical topology can cause a delay overhead in information propagation which makes the system vulnerable to double spend attacks. This paper introduces a proximity-aware extensions to the current Bitcoin protocol, named Master Node Based Clustering (MNBC). The ultimate purpose of the proposed protocol is to improve the information propagation delay in the Bitcoin network.