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: "trustshadow secure execution of unmodified applications with arm trustzone"
  Abstract: The rapid evolution of Internet-of-Things (IoT) technologies has led to an emerging need to make them smarter. A variety of applications now run simultaneously on an ARM-based processor. For example, devices on the edge of the Internet are provided with higher horsepower to be entrusted with storing, processing and analyzing data collected from IoT devices. This significantly improves efficiency and reduces the amount of data that needs to be transported to the cloud for data processing, analysis and storage. However, commodity OSes are prone to compromise. Once they are exploited, attackers can access the data on these devices. Since the data stored and processed on the devices can be sensitive, left untackled, this is particularly disconcerting. In this paper, we propose a new system, TrustShadow that shields legacy applications from untrusted OSes. TrustShadow takes advantage of ARM TrustZone technology and partitions resources into the secure and normal worlds. In the secure world, TrustShadow constructs a trusted execution environment for security-critical applications. This trusted environment is maintained by a lightweight runtime system that coordinates the communication between applications and the ordinary OS running in the normal world. The runtime system does not provide system services itself. Rather, it forwards requests for system services to the ordinary OS, and verifies the correctness of the responses. To demonstrate the efficiency of this design, we prototyped TrustShadow on a real chip board with ARM TrustZone support, and evaluated its performance using both microbenchmarks and real-world applications. We showed TrustShadow introduces only negligible overhead to real-world applications.

Connected through hyperedge HE-1 (induced by source paper "secloak arm trustzone based mobile peripheral control"):
  with members:
    - "sgxio generic trusted i o path for intel sgx"
    - "enter sandbox android sandbox comparison"
    - "pin skimming exploiting the ambient light sensor in mobile devices"
    - "quire lightweight provenance for smart phone operating systems"

Connected through hyperedge HE-2 (induced by source paper "streambox tz secure stream analytics at the edge with trustzone"):
  with members:
    - "securestreams a reactive middleware framework for secure data stream processing"
    - "c flat control flow attestation for embedded systems software"
    - "armageddon cache attacks on mobile devices"
    - "massively parallel sort merge joins in main memory multi core database systems"
    - "efficient system enforced deterministic parallelism"

Connected through hyperedge HE-3 (induced by source paper "the effect of iot new features on security and privacy new threats existing solutions and challenges yet to be solved"):
  with members:
    - "from physical to cyber escalating protection for personalized auto insurance"
    - "security of cyber physical systems"

Connected through hyperedge HE-4 (induced by source paper "let the cloud watch over your iot file systems"):
  with members:
    - "a robust real time automatic license plate recognition based on the yolo detector"
    - "sprobes enforcing kernel code integrity on the trustzone architecture"

Connected through hyperedge HE-5 (induced by source paper "microtee designing tee os based on the microkernel architecture"):
  with members:
    - "open tee an open virtual trusted execution environment"

Connected through hyperedge HE-6 (induced by source paper "security performance and energy trade offs of hardware assisted memory protection mechanisms"):
  with members:
    - "short paper stress sgx load and stress your enclaves for fun and profit"
    - "snort intrusion detection system with intel software guard extension intel sgx"
    - "severed subverting amd s virtual machine encryption"
    - "securestreams a reactive middleware framework for secure data stream processing"
    - "x search revisiting private web search using intel sgx"
    - "software grand exposure sgx cache attacks are practical"
    - "secure content based routing using intel software guard extensions"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"

Connected through hyperedge HE-7 (induced by source paper "achieving data dissemination with security using fiware and intel software guard extensions sgx"):
  with members:
    - "security and privacy preserving data aggregation in cloud computing"
    - "secure content based routing using intel software guard extensions"
    - "big data privacy in the internet of things era"
    - "oscar object security architecture for the internet of things"

Connected through hyperedge HE-8 (induced by source paper "streambox tz a secure iot analytics engine at the edge"):
  with members:
    - "securestreams a reactive middleware framework for secure data stream processing"
    - "armageddon cache attacks on mobile devices"
    - "massively parallel sort merge joins in main memory multi core database systems"

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)