[Resource Topic] 2023/538: Publicly Verifiable Deletion from Minimal Assumptions

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Title:
Publicly Verifiable Deletion from Minimal Assumptions

Authors: Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa

Abstract:

We present a general compiler to add the publicly verifiable deletion property for various cryptographic primitives including public key encryption, attribute-based encryption, and quantum fully homomorphic encryption. Our compiler only uses one-way functions, or more generally hard quantum planted problems for NP, which are implied by one-way functions. It relies on minimal assumptions and enables us to add the publicly verifiable deletion property with no additional assumption for the above primitives. Previously, such a compiler needs additional assumptions such as injective trapdoor one-way functions or pseudorandom group actions [Bartusek-Khurana-Poremba, ePrint:2023/370]. Technically, we upgrade an existing compiler for privately verifiable deletion [Bartusek-Khurana, ePrint:2022/1178] to achieve publicly verifiable deletion by using digital signatures.

ePrint: https://eprint.iacr.org/2023/538

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