human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Functional Encryption with Bounded Collusions via Multi-party Computation"
  Abstract: We construct functional encryption schemes for polynomial-time computable functions secure against an a-priori bounded polynomial number of collusions. Our constructions require only semantically secure public-key encryption schemes and pseudorandom generators computable by small-depth circuits known to be implied by most concrete intractability assumptions. For certain special cases such as predicate encryption schemes with public index, the construction requires only semantically secure encryption schemes.

Along the way, we show a "bootstrapping theorem" that builds a q-query functional encryption scheme for arbitrary functions starting from a q-query functional encryption scheme for bounded-degree functions. All our constructions rely heavily on techniques from secure multi-party computation and randomized encodings.

Our constructions are secure under a strong simulation-based definition of functional encryption.

Connected through hyperedge HE-1 (induced by source paper "Fully secure functional encryption with general relations from the decisional linear assumption"):
  with members:
    - "Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions"
    - "Functional encryption for inner product predicates from learning with errors"
    - "Attribute-Based Encryption for Commercial Content Distribution"

Connected through hyperedge HE-2 (induced by source paper "Candidate Indistinguishability Obfuscation and Functional Encryption for all Circuits"):
  with members:
    - "Functional encryption for inner product predicates from learning with errors"
    - "On Obfuscation with Random Oracles"
    - "Low Overhead Broadcast Encryption from Multilinear Maps"
    - "Graph-Induced Multilinear Maps from Lattices"
    - "Function Secret Sharing"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Mathematics