human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "design of distributed voting systems"
  Abstract: Countries like Estonia, Norway or Australia developed electronic voting systems, which could be used to realize parliamentary elections with the help of personal computers and the Internet. These systems are completely different in their design and their way to solve the same problem. In this thesis, we analyze some of the largest real-world systems, describe their building blocks and their general design to focus on possible problems in these electronic voting systems. #R##N#Furthermore, we present a template for an e-voting system, which we designed to try to fulfill the preliminaries and requirements of a secure electronic voting system. We use the experiences and the building blocks of existing systems to combine them to another more secure system. Afterwards, we compare our concept with real-world systems to evaluate the fulfillments of the requirements. Conclusively, we discuss the occurring problems when designing a secure system. #R##N#Peer-to-peer networks provide many advantages, like decentralization, which might be applicable to electronic voting systems. Therefore, we take a look on the distributed database called blockchain and the usage in a peer-to-peer voting system. Our contribution to this topic is a modification of the proof-of-stake, which enables the usage of common devices, like smartphones or tablets, for the blockchain verification and inclusion of new ballots to the chain. This proof does not need much computing power and has a lower carbon footprint than the proof-of-work in the Bitcoin protocol.

Connected through hyperedge HE-1 (induced by source paper "vmv augmenting an internet voting system with selene verifiability"):
  with members:
    - "assessing security and performances of consensus algorithms for permissioned blockchains"
    - "transparent voting platform based on permissioned blockchain"
    - "transaction propagation on permissionless blockchains incentive and routing mechanisms"

Connected through hyperedge HE-2 (induced by source paper "transparent voting platform based on permissioned blockchain"):
  with members:
    - "survey on remote electronic voting"

Connected through hyperedge HE-3 (induced by source paper "estonian voting verification mechanism revisited"):
  with members:
    - "the new south wales ivote system security failures and verification flaws in a live online election"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.CR(Cryptography and Security)