Paper 2022/1285
Lower Bounds for the Number of Decryption Updates in Registration-Based Encryption
Abstract
Registration-based encryption (Garg, Hajiabadi, Mahmoody, Rahimi, TCC'18) aims to offer what identity-based encryption offers without the key-escrow problem, which refers to the ability of the private-key generator to obtain parties' decryption keys at wish. In RBE, parties generate their own secret and public keys and register their public keys to the key curator (KC) who updates a compact public parameter after each registration. The updated public parameter can then be used to securely encrypt messages to registered identities.
A major drawback of RBE, compared with IBE, is that in order to decrypt, parties might need to periodically request so-called decryption updates from the KC. Current RBE schemes require
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published by the IACR in TCC 2022
- Keywords
- Registration-Based Encryption Lower Bounds Efficiency
- Contact author(s)
-
mahmoody @ gmail com
wq4sr @ virginia edu
ahmadreza rahimi @ mpi-sp org - History
- 2022-09-28: approved
- 2022-09-27: received
- See all versions
- Short URL
- https://ia.cr/2022/1285
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/1285, author = {Mohammad Mahmoody and Wei Qi and Ahmadreza Rahimi}, title = {Lower Bounds for the Number of Decryption Updates in Registration-Based Encryption}, howpublished = {Cryptology {ePrint} Archive, Paper 2022/1285}, year = {2022}, url = {https://eprint.iacr.org/2022/1285} }