Name
Abstract | ||
|---|---|---|
To simultaneously achieve CCA security and homomorphic property for encryption, Emura et al. introduced a new cryptographic primitive named keyed-homomorphic encryption, in which homomorphic ciphertext manipulations can only be performed by someone holding a devoted evaluation key which, by itself, does not enable decryption. A keyed-homomorphic encryption scheme should provide CCA2 security when the evaluation key is unavailable to the adversary and remain CCA1-secure when the evaluation key is exposed. While existing keyed-homomorphic encryption schemes only allow simple computations on encrypted data, our goal is to construct CCA-secure keyed-fully homomorphic encryption keyed-FHE capable of evaluating any functions on encrypted data with an evaluation key. In this paper, we first introduce a new primitive called convertible identity-based fully homomorphic encryption IBFHE, which is an IBFHE with an additional transformation functionality, and define its security notions. Then, we present a generic construction of CCA-secure keyed-FHE from IND-sID-CPA-secure convertible IBFHE and strongly EUF-CMA-secure signature. Finally, we propose a concrete construction of IND-sID-CPA-secure convertible IBFHE, resulting in the first CCA-secure keyed-FHE scheme in the standard model. |
Year | DOI | Venue |
|---|---|---|
2016 | 10.1007/978-3-662-49384-7_4 | International Workshop on Practice and Theory in Public Key Cryptography |
Keywords | Field | DocType |
Chosen ciphertext security, Fully homomorphic encryption, Convertible identity-based fully homomorphic encryption | Multiple encryption,Computer science,Computer security,Attribute-based encryption,Theoretical computer science,Encryption,40-bit encryption,Probabilistic encryption,On-the-fly encryption,Filesystem-level encryption,56-bit encryption | Conference |
Volume | ISSN | Citations |
9614 | 0302-9743 | 2 |
PageRank | References | Authors |
0.36 | 33 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Junzuo Lai | 1 | 419 | 24.55 |
| R.H Deng | 2 | 4423 | 362.82 |
| Changshe Ma | 3 | 2 | 0.36 |
| Kouichi Sakurai | 4 | 1514 | 213.71 |
| Jian Weng | 5 | 1073 | 77.90 |