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: "severed subverting amd s virtual machine encryption"
  Abstract: AMD SEV is a hardware feature designed for the secure encryption of virtual machines. SEV aims to protect virtual machine memory not only from other malicious guests and physical attackers, but also from a possibly malicious hypervisor. This relieves cloud and virtual server customers from fully trusting their server providers and the hypervisors they are using. We present the design and implementation of SEVered, an attack from a malicious hypervisor capable of extracting the full contents of main memory in plaintext from SEV-encrypted virtual machines. SEVered neither requires physical access nor colluding virtual machines, but only relies on a remote communication service, such as a web server, running in the targeted virtual machine. We verify the effectiveness of SEVered on a recent AMD SEV-enabled server platform running different services, such as web or SSH servers, in encrypted virtual machines. With these examples, we demonstrate that SEVered reliably and efficiently extracts all memory contents even in scenarios where the targeted virtual machine is under high load.

Connected through hyperedge HE-1 (induced by source paper "sok hardware security support for trustworthy execution"):
  with members:
    - "secloak arm trustzone based mobile peripheral control"
    - "reverse engineering x86 processor microcode"
    - "extracting secrets from encrypted virtual machines"
    - "sgxpectre stealing intel secrets from sgx enclaves via speculative execution"
    - "spectre attacks exploiting speculative execution"
    - "pac it up towards pointer integrity using arm pointer authentication"
    - "lord of the x86 rings a portable user mode privilege separation architecture on x86"
    - "a survey of hardware based control flow integrity cfi"

Connected through hyperedge HE-2 (induced by source paper "insecure until proven updated analyzing amd sev s remote attestation"):
  with members:
    - "secure encrypted virtualization is unsecure"
    - "security analysis of encrypted virtual machines"

Connected through hyperedge HE-3 (induced by source paper "extracting secrets from encrypted virtual machines"):
  with members:
    - "secure encrypted virtualization is unsecure"
    - "security analysis of encrypted virtual machines"

Connected through hyperedge HE-4 (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"
    - "securestreams a reactive middleware framework for secure data stream processing"
    - "x search revisiting private web search using intel sgx"
    - "trustshadow secure execution of unmodified applications with arm trustzone"
    - "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"

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)