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: "2 3 an energy efficient configurable lattice cryptography processor for the quantum secure internet of things"
  Abstract: Modern public key protocols, such as RSA and elliptic curve cryptography (ECC), will be rendered insecure by Shor’s algorithm [1] when large-scale quantum computers are built. Therefore, cryptographers are working on quantum-resistant algorithms, and lattice-based cryptography has emerged as a prime candidate [1]. However, high computational complexity of these algorithms makes it challenging to implement lattice-based protocols on resource-constrained IoT devices, which need to secure data against both present and future adversaries. To address this challenge, we present a lattice cryptography processor with configurable parameters, which enables up to two orders of magnitude energy savings and 124K-gate reduction in system area through architectural optimizations. The ASIC demonstrates multiple lattice-based protocols proposed in Round 1 of the NIST post-quantum standardization process.

Connected through hyperedge HE-1 (induced by source paper "sapphire a configurable crypto processor for post quantum lattice based protocols"):
  with members:
    - "an energy efficient reconfigurable dtls cryptographic engine for end to end security in iot applications"
    - "classical hardness of learning with errors"
    - "quantum computation and lattice problems"

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)