Cryptology ePrint Archive: Report 2021/039
Practical FHE parameters against lattice attacks
Jung Hee Cheon and Yongha Son and Donggeon Yhee
Abstract: We give secure parameter suggestions to use sparse secret vectors in LWE based encryption schemes. This should replace existing security parameters, because homomorphic encryption(HE) schemes use quite different variables from the existing parameters. In particular HE schemes using sparse secrets should be supported by experimental analysis, here we summarize existing attacks to be considered and security levels for each attacks. Based on the analysis and experiments, we compute optimal scaling factors for CKKS.
Category / Keywords: public-key cryptography / fully homomorphic encryption, sparse secrets, hybrid attacks
Date: received 10 Jan 2021, last revised 27 Jan 2021
Contact author: dgyhee at gmail com
Available format(s): PDF | BibTeX Citation
Note: Acknowledge is modified.
Version: 20210127:121752 (All versions of this report)
Short URL: ia.cr/2021/039
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