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: "an empirical study of the i2p anonymity network and its censorship resistance"
  Abstract: Tor and I2P are well-known anonymity networks used by many individuals to protect their online privacy and anonymity. Tor's centralized directory services facilitate the understanding of the Tor network, as well as the measurement and visualization of its structure through the Tor Metrics project. In contrast, I2P does not rely on centralized directory servers, and thus obtaining a complete view of the network is challenging. In this work, we conduct an empirical study of the I2P network, in which we measure properties including population, churn rate, router type, and the geographic distribution of I2P peers. We find that there are currently around 32K active I2P peers in the network on a daily basis. Of these peers, 14K are located behind NAT or firewalls.   Using the collected network data, we examine the blocking resistance of I2P against a censor that wants to prevent access to I2P using address-based blocking techniques. Despite the decentralized characteristics of I2P, we discover that a censor can block more than 95% of peer IP addresses known by a stable I2P client by operating only 10 routers in the network. This amounts to severe network impairment: a blocking rate of more than 70% is enough to cause significant latency in web browsing activities, while blocking more than 90% of peer IP addresses can make the network unusable. Finally, we discuss the security consequences of the network being blocked, and directions for potential approaches to make I2P more resistant to blocking.

Connected through hyperedge HE-1 (induced by source paper "protocol proxy an fte based covert channel"):
  with members:
    - "tarn a sdn based traffic analysis resistant network architecture"
    - "a covert data transport protocol"
    - "stealthy malware traffic not as innocent as it looks"
    - "i know why you went to the clinic risks and realization of https traffic analysis"
    - "covert ephemeral communication in named data networking"

Connected through hyperedge HE-2 (induced by source paper "iclab a global longitudinal internet censorship measurement platform"):
  with members:
    - "on identifying anomalies in tor usage with applications in detecting internet censorship"
    - "tranco a research oriented top sites ranking hardened against manipulation"
    - "exploring server side blocking of regions"
    - "a long way to the top significance structure and stability of internet top lists"
    - "a bestiary of blocking the motivations and modes behind website unavailability"
    - "where the light gets in analyzing web censorship mechanisms in india"
    - "filteredweb a framework for the automated search based discovery of blocked urls"
    - "lsh ensemble internet scale domain search"

Connected through hyperedge HE-3 (induced by source paper "assessing the privacy benefits of domain name encryption"):
  with members:
    - "analyzing the costs and benefits of dns dot and doh for the modern web"
    - "iclab a global longitudinal internet censorship measurement platform"
    - "measuring i2p censorship at a global scale"
    - "tranco a research oriented top sites ranking hardened against manipulation"
    - "a long way to the top significance structure and stability of internet top lists"
    - "hiding in plain sight a longitudinal study of combosquatting abuse"
    - "your neighbors are my spies location and other privacy concerns in glbt focused location based dating applications"
    - "k fingerprinting a robust scalable website fingerprinting technique"

Connected through hyperedge HE-4 (induced by source paper "measuring i2p censorship at a global scale"):
  with members:
    - "iclab a global longitudinal internet censorship measurement platform"
    - "where the light gets in analyzing web censorship mechanisms in india"
    - "censorship in the wild analyzing internet filtering in syria"
    - "the anatomy of web censorship in pakistan"
    - "dimming the internet detecting throttling as a mechanism of censorship in iran"

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.NI(Networking and Internet Architecture)