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: "the spy in the sandbox practical cache attacks in javascript"
  Abstract: We present the first micro-architectural side-channel attack which runs entirely in the browser. In contrast to other works in this genre, this attack does not require the attacker to install any software on the victim’s machine ‐ to facilitate the attack, the victim needs only to browse to an untrusted webpage with attacker-controlled content. This makes the attack model highly scalable and extremely relevant and practical to today’s web, especially since most desktop browsers currently accessing the Internet are vulnerable to this attack. Our attack, which is an extension of the last-level cache attacks of Yarom et al. [23], allows a remote adversary recover information belonging to other processes, other users and even other virtual machines running on the same physical host as the victim web browser. We describe the fundamentals behind our attack, evaluate its performance using a high bandwidth covert channel and finally use it to construct a system-wide mouse/network activity logger. Defending against this attack is possible, but the required countermeasures can exact an impractical cost on other benign uses of the web browser and of the computer.

Connected through hyperedge HE-1 (induced by source paper "flush flush a fast and stealthy cache attack"):
  with members:
    - "rowhammer js a remote software induced fault attack in javascript"

Connected through hyperedge HE-2 (induced by source paper "rowhammer js a remote software induced fault attack in javascript"):
  with members:
    - "flush flush a fast and stealthy cache attack"
    - "flush flush a fast and stealthy cache attack"
    - "reverse engineering intel dram addressing and exploitation"

Connected through hyperedge HE-3 (induced by source paper "flush flush a fast and stealthy cache attack"):
  with members:
    - "rowhammer js a remote software induced fault attack in javascript"

Connected through hyperedge HE-4 (induced by source paper "preventing your faults from telling your secrets defenses against pigeonhole attacks"):
  with members:
    - "determinating timing channels in compute clouds"

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)