Strongly secure universal thresholdizer
Ebrahimi E, Yadav A. 2024. Strongly secure universal thresholdizer. 30th International Conference on the Theory and Application of Cryptology and Information Security. ASIACRYPT: Conference on the Theory and Application of Cryptology and Information Security vol. 15486, 207–239.
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Author
Ebrahimi, Ehsan;
Yadav, AnshuISTA
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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.
Publishing Year
Date Published
2024-12-12
Proceedings Title
30th International Conference on the Theory and Application of Cryptology and Information Security
Publisher
Springer Nature
Acknowledgement
Ehsan Ebrahimi is supported by the Luxembourg National Research Fund under the Junior CORE project QSP (C22/IS/17272217/QSP/Ebrahimi).
Volume
15486
Page
207-239
Conference
ASIACRYPT: Conference on the Theory and Application of Cryptology and Information Security
Conference Location
Kolkata, India
Conference Date
2024-12-09 – 2024-12-13
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Cite this
Ebrahimi E, Yadav A. Strongly secure universal thresholdizer. In: 30th International Conference on the Theory and Application of Cryptology and Information Security. Vol 15486. Springer Nature; 2024:207-239. doi:10.1007/978-981-96-0891-1_7
Ebrahimi, E., & Yadav, A. (2024). Strongly secure universal thresholdizer. In 30th International Conference on the Theory and Application of Cryptology and Information Security (Vol. 15486, pp. 207–239). Kolkata, India: Springer Nature. https://doi.org/10.1007/978-981-96-0891-1_7
Ebrahimi, Ehsan, and Anshu Yadav. “Strongly Secure Universal Thresholdizer.” In 30th International Conference on the Theory and Application of Cryptology and Information Security, 15486:207–39. Springer Nature, 2024. https://doi.org/10.1007/978-981-96-0891-1_7.
E. Ebrahimi and A. Yadav, “Strongly secure universal thresholdizer,” in 30th International Conference on the Theory and Application of Cryptology and Information Security, Kolkata, India, 2024, vol. 15486, pp. 207–239.
Ebrahimi E, Yadav A. 2024. Strongly secure universal thresholdizer. 30th International Conference on the Theory and Application of Cryptology and Information Security. ASIACRYPT: Conference on the Theory and Application of Cryptology and Information Security vol. 15486, 207–239.
Ebrahimi, Ehsan, and Anshu Yadav. “Strongly Secure Universal Thresholdizer.” 30th International Conference on the Theory and Application of Cryptology and Information Security, vol. 15486, Springer Nature, 2024, pp. 207–39, doi:10.1007/978-981-96-0891-1_7.
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