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: "A unified framework for UC from only OT"
  Abstract: In [1], the authors presented a unified framework for constructing Universally Composable (UC) secure computation protocols, assuming only enhanced trapdoor permutations. In this work, we weaken the hardness assumption underlying the unified framework to only the existence of a stand-alone secure semi-honest Oblivious Transfer (OT) protocol. The new framwork directly implies new and improved UC feasibility results from only the existence of a semi-honest OT protocol in various models. Since in many models, the existence of UC-OT implies the existence of a semi-honest OT protocol.

Furthermore, we show that by relying on a more fine-grained analysis of the unified framework, we obtain concurrently secure computation protocols with super-polynomial-time simulation (SPS), based on the necessary assumption of the existence of a semi-honest OT protocol that can be simulated in super-polynomial times. When the underlying OT protocol has constant rounds, the SPS secure protocols constructed also have constant rounds. This yields the first construction of constant-round secure computation protocols that satisfy a meaningful notions of concurrent security (i.e., SPS security) based on tight assumptions.

A notable corollary following from our new unifed framwork is that stand-alone (or bounded-concurrent) password authenticated key-exchange protocols (PAKE) can be constructed from only semi-honest OT protocols; combined with the result of [2] that the existence of PAKE protocols implies that of OT, we derive a tight characterization of PAKE protocols.

Connected through hyperedge HE-1 (induced by source paper "Non-interactive and reusable non-malleable commitment schemes"):
  with members:
    - "Efficient Non-malleable Commitment Schemes"
    - "New constructions of efficient simulation-sound commitments using encryption and their applications"

Connected through hyperedge HE-2 (induced by source paper "Round-Efficient Black-Box Construction of Composable Multi-Party Computation"):
  with members:
    (none)

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: Computer science