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: "iskios lightweight defense against kernel level code reuse attacks"
  Abstract: Commodity operating systems such as Windows, Linux, and MacOS X form the Trusted Computing Base (TCB) of today's computing systems. However, since they are written in C and C++, they have memory safety errors and are vulnerable to kernel-level code reuse attacks. This paper presents IskiOS: a system that helps to thwart such attacks by providing both execute-only memory and an efficient shadow stack for operating system kernels on the x86 processor. Execute-only memory hides the code segment from buffer overread attacks, strengthening code randomization techniques. Shadow stacks protect return addresses from corruption. IskiOS leverages Intel's Memory Protection Keys (MPK, a.k.a. PKU) and Kernel Page Table Isolation (KPTI) to protect kernel memory from buffer overwrite and overread attacks and to prevent corruption of the shadow stack. Unlike previous work, IskiOS places no restrictions on virtual address space layout, allowing the operating system to achieve higher diversification entropy by placing kernel stacks and kernel code in arbitrary locations within the virtual address space. IskiOS incurs virtually no performance overhead for execute-only memory. Its shadow stacks incur a geometric mean slowdown of 12.3% in our experiments.

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)