Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Segment blockchain: A size reduced storage mechanism for blockchain   The exponential growth of the blockchain size 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 \emph{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 requirement is mostly shrunken compared to the traditional design
and therefore making the blockchain more suitable for data-heavy applications.

25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga