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: "perfweb how to violate web privacy with hardware performance events"
  Abstract: The browser history reveals highly sensitive information about users, such as financial status, health conditions, or political views. Private browsing modes and anonymity networks are consequently important tools to preserve the privacy not only of regular users but in particular of whistleblowers and dissidents. Yet, in this work we show how a malicious application can infer opened websites from Google Chrome in Incognito mode and from Tor Browser by exploiting hardware performance events (HPEs). In particular, we analyze the browsers' microarchitectural footprint with the help of advanced Machine Learning techniques: k-th Nearest Neighbors, Decision Trees, Support Vector Machines, and in contrast to previous literature also Convolutional Neural Networks. We profile 40 different websites, 30 of the top Alexa sites and 10 whistleblowing portals, on two machines featuring an Intel and an ARM processor. By monitoring retired instructions, cache accesses, and bus cycles for at most 5 seconds, we manage to classify the selected websites with a success rate of up to 86.3%. The results show that hardware performance events can clearly undermine the privacy of web users. We therefore propose mitigation strategies that impede our attacks and still allow legitimate use of HPEs.

Connected through hyperedge HE-1 (induced by source paper "jackhammer efficient rowhammer on heterogeneous fpga cpu platforms"):
  with members:
    - "packet chasing spying on network packets over a cache side channel"
    - "fortuneteller predicting microarchitectural attacks via unsupervised deep learning"
    - "theory and practice of finding eviction sets"
    - "another flip in the wall of rowhammer defenses"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "autolock why cache attacks on arm are harder than you think"
    - "a software approach to defeating side channels in last level caches"
    - "flush flush a fast and stealthy cache attack"

Connected through hyperedge HE-2 (induced by source paper "magneticspy exploiting magnetometer in mobile devices for website and application fingerprinting"):
  with members:
    - "stealing pins via mobile sensors actual risk versus user perception"
    - "robust website fingerprinting through the cache occupancy channel"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "a study on power side channels on mobile devices"

Connected through hyperedge HE-3 (induced by source paper "undermining user privacy on mobile devices using ai"):
  with members:
    - "deepcloak adversarial crafting as a defensive measure to cloak processes"
    - "theory and practice of finding eviction sets"
    - "loophole timing attacks on shared event loops in chrome"
    - "autolock why cache attacks on arm are harder than you think"
    - "memory dos attacks in multi tenant clouds severity and mitigation"
    - "flush flush a fast and stealthy cache attack"
    - "tensorflow a system for large scale machine learning"
    - "flush flush a fast and stealthy cache attack"

Connected through hyperedge HE-4 (induced by source paper "robust website fingerprinting through the cache occupancy channel"):
  with members:
    - "measuring information leakage in website fingerprinting attacks and defenses"
    - "spectre attacks exploiting speculative execution"
    - "automated website fingerprinting through deep learning"
    - "loophole timing attacks on shared event loops in chrome"
    - "software grand exposure sgx cache attacks are practical"
    - "a software approach to defeating side channels in last level caches"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"
    - "k fingerprinting a robust scalable website fingerprinting technique"

Connected through hyperedge HE-5 (induced by source paper "microwalk a framework for finding side channels in binaries"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "ozone efficient execution with zero timing leakage for modern microarchitectures"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "did we learn from llc side channel attacks a cache leakage detection tool for crypto libraries"
    - "stacco differentially analyzing side channel traces for detecting ssl tls vulnerabilities in secure enclaves"
    - "rigorous analysis of software countermeasures against cache attacks"
    - "armageddon cache attacks on mobile devices"

Connected through hyperedge HE-6 (induced by source paper "onions in the crosshairs when the man really is out to get you"):
  with members:
    - "raptor routing attacks on privacy in tor"

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)