Delegatable ABE with $O(1)$ Delegations from Witness Encryption

Rishab Goyal; Saikumar Yadugiri

Paper 2025/407

Delegatable ABE with $O(1)$ Delegations from Witness Encryption

Rishab Goyal, University of Wisconsin-Madison

Saikumar Yadugiri

, University of Wisconsin-Madison

Abstract

Delegatable Attribute-Based Encryption (DABE) is a well-known generalization of ABE, proposed to mirror organizational hierarchies. We design a DABE scheme from witness encryption and other simple assumptions. Our construction does not rely on Random Oracles, and we provide a black-box reduction to polynomial hardness of underlying assumptions.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
Keywords: Attribute-Based Encryption Witness Encryption Key Delegation
Contact author(s): rishab @ cs wisc edu
saikumar @ cs wisc edu
History: 2025-06-03: last of 2 revisions; 2025-03-03: received; See all versions
Short URL: https://ia.cr/2025/407
License: CC BY

BibTeX

@misc{cryptoeprint:2025/407,
      author = {Rishab Goyal and Saikumar Yadugiri},
      title = {Delegatable {ABE} with $O(1)$ Delegations from Witness Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2025/407},
      year = {2025},
      url = {https://eprint.iacr.org/2025/407}
}