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 impact of quantum computing on present cryptography"
  Abstract: The aim of this paper is to elucidate the implications#N#of quantum computing in present cryptography and#N#to introduce the reader to basic post-quantum algorithms. In#N#particular the reader can delve into the following subjects: present#N#cryptographic schemes (symmetric and asymmetric), differences#N#between quantum and classical computing, challenges in quantum#N#computing, quantum algorithms (Shor’s and Grover’s), public key#N#encryption schemes affected, symmetric schemes affected, the impact#N#on hash functions, and post quantum cryptography. Specifically,#N#the section of Post-Quantum Cryptography deals with#N#different quantum key distribution methods and mathematicalbased#N#solutions, such as the BB84 protocol, lattice-based cryptography,#N#multivariate-based cryptography, hash-based signatures#N#and code-based cryptography.

Connected through hyperedge HE-1 (induced by source paper "digitally mutating nv fpgas into physically clone resistant units"):
  with members:
    - "operator and manufacturer independent d2d private link for future 5g networks"
    - "new family of stream ciphers as physically clone resistant vlsi structures"

Connected through hyperedge HE-2 (induced by source paper "quantum advantage and y2k bug comparison"):
  with members:
    - "on testing quantum programs"

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)