A Lattice-Based Universal Thresholdizer for Cryptographic Systems

  title={A Lattice-Based Universal Thresholdizer for Cryptographic Systems},
  author={Dan Boneh and Rosario Gennaro and Steven Goldfeder and Sam Kim},
  journal={IACR Cryptology ePrint Archive},
We develop a general approach to thresholdizing a large class of (non-threshold) cryptographic schemes. We show how to add threshold functionality to CCA-secure public-key encryption (PKE), signature schemes, pseudorandom functions, and others primitives. To do so, we introduce a general tool, called a universal thresholdizer, from which many threshold systems are possible. The tool builds upon a latticebased fully-homomorphic encryption (FHE) system. Applying the tool to a (non-threshold… CONTINUE READING

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