intelligence_src_e53adb99e40ae66258
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- Observed
- Oct 08, 2026 21:12 UTC
- Retrieved
- Oct 13, 2026 04:25 UTC
A Note on Extractable Witness Encryption in Generic Groups
ePrint Report: A Note on Extractable Witness Encryption in Generic Groups Matteo Campanelli Hair and Sahai have recently proposed a construction of witness encryption for NP satisfying semantic security. In this short note we observe that this recent witness-encryption construction is unconditionally extractable in the generic group model. This yields a construction of extractable witness encryption without assuming subexponential soundness of SNARGs, in contrast to the recent work of Jin (eprint:2026/2063), which requires this assumption. The result in this note, moreover, complements the concurrent work of Chen and Vaikuntanathan (eprint:2026/2346), who show the same construction to be public-coin extractable under a knowledge-style assumption; our argument is unconditional, but in the GGM.
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- research-report
- First reported
- Oct 08, 2026 21:12 UTC
- Last reported
- Oct 08, 2026 21:12 UTC
- Catalog updated
- Oct 13, 2026 04:25 UTC
- Record ID
a43ad4136db284a548f201143f4e8136c50593f9ec8775154d0d013b5a4abacf
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