@inproceedings{18755,
  abstract     = {A universalthresholdizer (UT), constructed from a threshold fully homomorphic encryption by Boneh et. al , Crypto 2018, is a general framework for universally thresholdizing many cryptographic schemes. However, their framework is insufficient to construct strongly secure threshold schemes, such as threshold signatures and threshold public-key encryption, etc.

In this paper, we strengthen the security definition for a universal thresholdizer and propose a scheme which satisfies our stronger security notion. Our UT scheme is an improvement of Boneh et. al ’s construction at the level of threshold fully homomorphic encryption using a key homomorphic pseudorandom function. We apply our strongly secure UT scheme to construct strongly secure threshold signatures and threshold public-key encryption.},
  author       = {Ebrahimi, Ehsan and Yadav, Anshu},
  booktitle    = {30th International Conference on the Theory and Application of Cryptology and Information Security},
  isbn         = {9789819608904},
  issn         = {1611-3349},
  location     = {Kolkata, India},
  pages        = {207--239},
  publisher    = {Springer Nature},
  title        = {{Strongly secure universal thresholdizer}},
  doi          = {10.1007/978-981-96-0891-1_7},
  volume       = {15486},
  year         = {2024},
}