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: "new lattice based cryptographic constructions"
  Abstract: We introduce the use of Fourier analysis on lattices as an integral part of a lattice based construction. The tools we develop provide an elegant description of certain Gaussian distributions around lattice points. Our results include two cryptographic constructions which are based on the worst-case hardness of the unique shortest vector problem. The main result is a new public key cryptosystem whose security guarantee is considerably stronger than previous results ($O(n^{1.5})$ instead of $O(n^7)$). This provides the first alternative to Ajtai and Dwork's original 1996 cryptosystem. Our second result is a family of collision resistant hash functions which, apart from improving the security in terms of the unique shortest vector problem, is also the first example of an analysis which is not based on Ajtai's iterative step. Surprisingly, both results are derived from one theorem which presents two indistinguishable distributions on the segment $[0,1)$. It seems that this theorem can have further applications and as an example we mention how it can be used to solve an open problem related to quantum computation.

Connected through hyperedge HE-1 (induced by source paper "parameterized intractability of even set and shortest vector problem"):
  with members:
    - "gap s eth hardness of svp"
    - "parameterized complexity of csp for infinite constraint languages"
    - "on the quantitative hardness of cvp"
    - "a birthday repetition theorem and complexity of approximating dense csps"
    - "on the hardness of learning sparse parities"
    - "tensor based hardness of the shortest vector problem to within almost polynomial factors"
    - "a simple deterministic reduction for the gap minimum distance of code problem"

Connected through hyperedge HE-2 (induced by source paper "parameterized intractability of even set and shortest vector problem from gap eth"):
  with members:
    - "on the quantitative hardness of cvp"
    - "a birthday repetition theorem and complexity of approximating dense csps"
    - "the parameterized complexity of k biclique"

Connected through hyperedge HE-3 (induced by source paper "learning with errors and extrapolated dihedral cosets"):
  with members:
    - "classical hardness of learning with errors"
    - "quantum computation and lattice problems"

Connected through hyperedge HE-4 (induced by source paper "on the lattice smoothing parameter problem"):
  with members:
    - "enumerative lattice algorithms in any norm via m ellipsoid coverings"

Connected through hyperedge HE-5 (induced by source paper "classical hardness of learning with errors"):
  with members:
    - "quantum computation and lattice problems"

Connected through hyperedge HE-6 (induced by source paper "improved hardness results for unique shortest vector problem"):
  with members:
    - "search to decision reductions for lattice problems with approximation factors slightly greater than one"
    - "tensor based hardness of the shortest vector problem to within almost polynomial factors"

Connected through hyperedge HE-7 (induced by source paper "approximating the closest vector problem using an approximate shortest vector oracle"):
  with members:
    - "tensor based hardness of the shortest vector problem to within almost polynomial factors"

Connected through hyperedge HE-8 (induced by source paper "linear time nearest point algorithms for coxeter lattices"):
  with members:
    - "an algorithm to compute the nearest point in the lattice a_ n"

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)