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: "attack analysis results for adversarial engagement 1 of the darpa transparent computing program"
  Abstract: This report presents attack analysis results of the first adversarial engagement event stream for the first engagement of the DARPA TC program conducted in October 2016. The analysis was performed by Stony Brook University and University of Illinois at Chicago. The findings in this report are obtained without prior knowledge of the attacks conducted.

Connected through hyperedge HE-1 (induced by source paper "on preempting advanced persistent threats using probabilistic graphical models"):
  with members:
    - "vulnerable open source dependencies counting those that matter"
    - "on the inability of markov models to capture criticality in human mobility"
    - "snorkel rapid training data creation with weak supervision"
    - "catching worms trojan horses and pups unsupervised detection of silent delivery campaigns"
    - "thou shalt not depend on me analysing the use of outdated javascript libraries on the web"
    - "towards detecting compromised accounts on social networks"
    - "opengm a c library for discrete graphical models"

Connected through hyperedge HE-2 (induced by source paper "runtime analysis of whole system provenance"):
  with members:
    - "provenance based intrusion detection opportunities and challenges"
    - "saql a stream based query system for real time abnormal system behavior detection"
    - "struc2vec learning node representations from structural identity"
    - "camflow managed data sharing for cloud services"
    - "frappuccino fault detection through runtime analysis of provenance"
    - "practical whole system provenance capture"
    - "high throughput ingest of provenance records into accumulo"

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)