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: "the internet of hackable things"
  Abstract: The Internet of Things makes possible to connect each everyday object to the Internet, making computing pervasive like never before. From a security and privacy perspective, this tsunami of connectivity represents a disaster, which makes each object remotely hackable. We claim that, in order to tackle this issue, we need to address a new challenge in security: education.

Connected through hyperedge HE-1 (induced by source paper "towards blockchain based multi agent robotic systems analysis classification and applications"):
  with members:
    - "a reference architecture for smart and software defined buildings"
    - "interacting with the internet of things using smart contracts and blockchain technologies"
    - "controlling robots using artificial intelligence and a consortium blockchain"
    - "blockchain solutions for multi agent robotic systems related work and open questions"
    - "towards the internet of robotic things analysis architecture components and challenges"
    - "robochain a secure data sharing framework for human robot interaction"
    - "an architecture for distributed ledger based m2m auditing for electric autonomous vehicles"
    - "smart contracts for multiagent plan execution in untrusted cyber physical systems"

Connected through hyperedge HE-2 (induced by source paper "a machine to machine framework for the charging of electric autonomous vehicles"):
  with members:
    - "towards blockchain based multi agent robotic systems analysis classification and applications"
    - "an architecture for distributed ledger based m2m auditing for electric autonomous vehicles"
    - "on m2m micropayments a case study of electric autonomous vehicles"
    - "microservices how to make your application scale"

Connected through hyperedge HE-3 (induced by source paper "towards the internet of robotic things analysis architecture components and challenges"):
  with members:
    - "a reference architecture for smart and software defined buildings"
    - "robots as a service in cloud computing search and rescue in large scale disasters case study"
    - "antibiotic protecting iot devices against ddos attacks"
    - "deriving specifications of dependable systems toward a method"

Connected through hyperedge HE-4 (induced by source paper "a reference architecture for smart and software defined buildings"):
  with members:
    - "an architecture for distributed ledger based m2m auditing for electric autonomous vehicles"
    - "information exchange in randomly deployed dense wsns with wireless energy harvesting capabilities"
    - "jolie coog buildings internet of things for smart building infrastructure supporting concurrent apps utilizing distibuted microservices"

Connected through hyperedge HE-5 (induced by source paper "adding salt to pepper a structured security assessment over a humanoid robot"):
  with members:
    - "sros securing ros over the wire in the graph and through the kernel"
    - "mithys mind the hand you shake protecting mobile devices from ssl usage vulnerabilities"

Connected through hyperedge HE-6 (induced by source paper "microservices how to make your application scale"):
  with members:
    - "microservices a language based approach"
    - "microservices yesterday today and tomorrow"
    - "antibiotic protecting iot devices against ddos attacks"
    - "refinement types in jolie"
    - "jolie coog buildings internet of things for smart building infrastructure supporting concurrent apps utilizing distibuted microservices"
    - "jolie community on the rise"

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)