Paper 2020/1135
Adaptively Secure Inner Product Encryption from LWE
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, and Takashi Yamakawa
Abstract
Attribute-based encryption (ABE) is an advanced form of encryption scheme allowing for access policies to be embedded within the secret keys and ciphertexts.
By now, we have ABEs supporting numerous types of policies based on hardness assumptions over bilinear maps and lattices.
However, one of the distinguishing differences between ABEs based on these two breeds of assumptions is that the former can achieve adaptive security for quite expressible policies (e.g., inner-products, boolean formula) while the latter can not.
Recently, two adaptively secure lattice-based ABEs have appeared and changed the state of affairs:
a non-zero inner-product (NIPE) encryption by Katsumata and Yamada (PKC'19) and an ABE for
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- A minor revision of an IACR publication in ASIACRYPT 2020
- Keywords
- inner product encryptionadaptive securityLWE
- Contact author(s)
- takashi yamakawa obf @ gmail com
- History
- 2020-09-21: received
- Short URL
- https://ia.cr/2020/1135
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2020/1135, author = {Shuichi Katsumata and Ryo Nishimaki and Shota Yamada and Takashi Yamakawa}, title = {Adaptively Secure Inner Product Encryption from {LWE}}, howpublished = {Cryptology {ePrint} Archive, Paper 2020/1135}, year = {2020}, url = {https://eprint.iacr.org/2020/1135} }