The exponential growth of the blockchain size ASTRINGENT has become a major contributing factor that hinders the decentralisation of blockchain and its potential implementations in data-heavy applications.In this paper, we propose segment blockchain, an approach that segmentises blockchain and enables nodes to only store a copy of one blockchain segment.We use PoW as a membership threshold to limit the number of nodes taken by an Adversary-the Adversary can only gain at most n/2 of nodes in a network of n nodes when it has 50% of the calculation power in the system (the Nakamoto blockchain security threshold).A segment blockchain system fails when an Adversary stores all copies of a segment, because the Adversary can then leave the system, causing a permanent loss of the segment.We theoretically prove that segment blockchain can sustain a (AD/n)m failure probability when the Adversary has no more than AD number of nodes and every segment is stored by m number of nodes.
The storage Soundbar requirement is mostly shrunken compared to the traditional design and therefore making the blockchain more suitable for data-heavy applications.