Paper 2020/886
Adaptively Secure Revocable Hierarchical IBE from -linear Assumption
Keita Emura, Atsushi Takayasu, and Yohei Watanabe
Abstract
Revocable identity-based encryption (RIBE) is an extension of IBE with an efficient key revocation mechanism. Revocable hierarchical IBE (RHIBE) is its further extension with key delegation functionality. Although there are various adaptively secure pairing-based RIBE schemes, all known hierarchical analogs only satisfy selective security. In addition, the currently known most efficient adaptively secure RIBE and selectively secure RHIBE schemes rely on non-standard assumptions, which are referred to as the augmented DDH assumption and
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Minor revision. Designs, Codes and Cryptography
- Contact author(s)
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k-emura @ nict go jp
takayasu @ nict go jp
watanabe @ uec ac jp - History
- 2021-06-01: last of 2 revisions
- 2020-07-16: received
- See all versions
- Short URL
- https://ia.cr/2020/886
- License
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CC BY
BibTeX
@misc{cryptoeprint:2020/886, author = {Keita Emura and Atsushi Takayasu and Yohei Watanabe}, title = {Adaptively Secure Revocable Hierarchical {IBE} from $k$-linear Assumption}, howpublished = {Cryptology {ePrint} Archive, Paper 2020/886}, year = {2020}, url = {https://eprint.iacr.org/2020/886} }