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- Title
FHE-CF: designing of fully homomorphic encryption scheme based on ciphertext flattening technique.
- Authors
ZHANG Shuang; YANG Ya-tao; LI Zi-chen
- Abstract
In order to solve the problem of ciphertext operation in the cloud, this paper presented a new fully homomorphic encryption scheme based on LWE problem. It applied a novel ciphertext flattening technique in this scheme to control the noise efficiently instead of relinearization technique which was applied by other traditional LWE-based fully homomorphic encryption schemes. Without introducing new assumptions whose security had not been confirmed, it constructed a KDM secure bootstrappable encryption scheme, which leaded to a breakthough in the security of FHE-CF. Because of its KDM security, a cyclic keychain could be designed properly to transform a leveled fully homomorphic encryption scheme into a fully homomorphic encryption scheme. This paper has also been proved the FHE-CF scheme's IND-CPA security under the random oracle model. Besides the FHE-CF scheme has the same efficiency with these previous fully homomorphic encryption schemes.
- Publication
Application Research of Computers / Jisuanji Yingyong Yanjiu, 2015, Vol 32, Issue 2, p498
- ISSN
1001-3695
- Publication type
Article
- DOI
10.3969/j.issn.1001-3695.2015.02.039