Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CoVer: Collaborative Light-Node-Only Verification and Data Availability
  for Blockchains   Validating a blockchain incurs heavy computation, communication, and storage
costs. As a result, clients with limited resources, called light nodes, cannot
verify transactions independently and must trust full nodes, making them
vulnerable to security attacks. Motivated by this problem, we ask a fundamental
question: can light nodes securely validate without any full nodes? We answer
affirmatively by proposing CoVer, a decentralized protocol that allows a group
of light nodes to collaboratively verify blocks even under a dishonest
majority, achieving the same level of security for block validation as full
nodes while only requiring a fraction of the work. In particular, work per node
scales down proportionally with the number of participants (up to a log
factor), resulting in computation, communication, and storage requirements that
are sublinear in block size. Our main contributions are light-node-only
protocols for fraud proofs and data availability.

15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys