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: "non associative public key cryptography"
  Abstract: We introduce a generalized Anshel-Anshel-Goldfeld (AAG) key establishment protocol (KEP) for magmas. This leads to the foundation of non-associative public-key cryptography (PKC), generalizing the concept of non-commutative PKC. We show that left selfdistributive systems appear in a natural special case of a generalized AAG-KEP for magmas, and we propose, among others instances, concrete realizations using $f$-conjugacy in groups and shifted conjugacy in braid groups. We discuss the advantages of our schemes compared with the classical AAG-KEP based on conjugacy in braid groups.

Connected through hyperedge HE-1 (induced by source paper "algebraic extension ring framework for non commutative asymmetric cryptography"):
  with members:
    - "post quantum cryptography s381 cyclic subgroup of high order"

Connected through hyperedge HE-2 (induced by source paper "pqc triple decomposition problem applied to gl d fp a secure framework for canonical non commutative cryptography"):
  with members:
    - "complexity limitations on quantum computation"

Connected through hyperedge HE-3 (induced by source paper "post quantum cryptography s381 cyclic subgroup of high order"):
  with members:
    - "complexity limitations on quantum computation"

Connected through hyperedge HE-4 (induced by source paper "post quantum cryptography pqc generalized elgamal cipher over gf 251 8"):
  with members:
    - "polynomial time solutions of computational problems in noncommutative algebraic cryptography"

Connected through hyperedge HE-5 (induced by source paper "polynomial time solutions of computational problems in noncommutative algebraic cryptography"):
  with members:
    - "braid group cryptography"
    - "length based attacks for certain group based encryption rewriting systems"

Connected through hyperedge HE-6 (induced by source paper "non associative key establishment protocols and their implementation"):
  with members:
    - "iterated ld problem in non associative key establishment"
    - "non associative key establishment for left distributive systems"
    - "using shifted conjugacy in braid based cryptography"

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)