Paper 2024/740
Multi-Client Functional Encryption with Public Inputs and Strong Security
Abstract
Recent years have witnessed a significant development for functional encryption (FE) in the multi-user setting, particularly with multi-client functional encryption (MCFE). The challenge becomes more important when combined with access control, such as attribute-based encryption (ABE), which was actually not covered syntactically by the public-key FE nor semantically by the secret-key MCFE frameworks. On the other hand, as for complex primitives, many works have studied the admissibility of adversaries to ensure that the security model encompasses all real threats of attacks.
1. At a conceptual level, by adding a public input to FE/MCFE, we cover many previous primitives, notably attribute-based function classes. Furthermore, with the strongest admissibility for inner-product functionality, our framework is quite versatile, as it encrypts multiple sub-vectors, allows repetitions and corruptions, and eventually also encompasses public-key FE and classical ABE, bridging the
Note: Updates with an overview for the main construction from Section 4.2; (February 19, 2025) Publication notes
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- A minor revision of an IACR publication in PKC 2025
- Keywords
- Functional EncryptionSecurity Notions
- Contact author(s)
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ky nguyen @ ens fr
hieu phan @ telecom-paris fr
david pointcheval @ ens fr - History
- 2025-02-19: last of 2 revisions
- 2024-05-15: received
- See all versions
- Short URL
- https://ia.cr/2024/740
- License
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CC BY
BibTeX
@misc{cryptoeprint:2024/740, author = {Ky Nguyen and Duong Hieu Phan and David Pointcheval}, title = {Multi-Client Functional Encryption with Public Inputs and Strong Security}, howpublished = {Cryptology {ePrint} Archive, Paper 2024/740}, year = {2024}, url = {https://eprint.iacr.org/2024/740} }