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: "coding schemes for securing cyber physical systems against stealthy data injection attacks"
  Abstract: This paper considers a method of coding the sensor outputs in order to detect stealthy false data injection attacks. An intelligent attacker can design a sequence of data injection to sensors and actuators that pass the state estimator and statistical fault detector, based on knowledge of the system parameters. To stay undetected, the injected data should increase the state estimation errors while keep the estimation residues small. We employ a coding matrix to change the original sensor outputs to increase the estimation residues under intelligent data injection attacks. This is a low-cost method compared with encryption schemes over all sensor measurements in communication networks. We show the conditions of a feasible coding matrix under the assumption that the attacker does not have knowledge of the exact coding matrix. An algorithm is developed to compute a feasible coding matrix, and, we show that in general, multiple feasible coding matrices exist. To defend against attackers who estimates the coding matrix via sensor and actuator measurements, time-varying coding matrices are designed according to the detection requirements. A heuristic algorithm to decide the time length of updating a coding matrix is then proposed.

Connected through hyperedge HE-1 (induced by source paper "state of the art of cyber physical systems security an automatic control perspective"):
  with members:
    - "on redundant observability from security index to attack detection and resilient state estimation"
    - "detection of sensor attack and resilient state estimation for uniformly observable nonlinear systems having redundant sensors"
    - "analysis of stochastic switched systems with application to networked control under jamming attacks"
    - "detecting integrity attacks on control systems using a moving target approach"
    - "a moving horizon hybrid stochastic game for secure control of cyber physical systems"
    - "modeling and performance evaluation of stealthy false data injection attacks on smart grid in the presence of corrupted measurements"
    - "state estimation with secrecy against eavesdroppers"
    - "a formal approach to cyber physical attacks"

Connected through hyperedge HE-2 (induced by source paper "robust sensor design against multiple attackers with misaligned control objectives"):
  with members:
    - "secure sensor design against undetected infiltration minimum impact minimum damage"
    - "cyber physical systems security a survey"
    - "hierarchical multistage gaussian signaling games in noncooperative communication and control systems"

Connected through hyperedge HE-3 (induced by source paper "distributed watermarking for secure control of microgrids under replay attacks"):
  with members:
    - "on the impact of wireless jamming on the distributed secondary microgrid control"
    - "a decentralized scalable approach to voltage control of dc islanded microgrids"

Connected through hyperedge HE-4 (induced by source paper "secure sensor design against undetected infiltration minimum impact minimum damage"):
  with members:
    - "cyber physical systems security a survey"

Connected through hyperedge HE-5 (induced by source paper "security against false data injection attack in cyber physical systems"):
  with members:
    - "sequential decision algorithms for measurement based impromptu deployment of a wireless relay network along a line"

Connected through hyperedge HE-6 (induced by source paper "integrating security in resource constrained cyber physical systems"):
  with members:
    - "exploring opportunistic execution for integrating security into legacy hard real time systems"

Connected through hyperedge HE-7 (induced by source paper "a moving horizon hybrid stochastic game for secure control of cyber physical systems"):
  with members:
    - "fast planning in stochastic games"

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)