Optimal Design of Key Switching Parameters for Efficient CKKS Bootstrapping | Zendy

Sieun Seo | Zendy; Chohong Min | Zendy

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Optimal Design of Key Switching Parameters for Efficient CKKS Bootstrapping

Author(s) -

Sieun Seo,

Chohong Min

Publication year - 2025

Publication title -

ieee access

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.587

H-Index - 127

eISSN - 2169-3536

DOI - 10.1109/access.2025.3610909

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

Bootstrapping in fully homomorphic encryption depends on a wide range of parameters that significantly influence both performance and precision. Traditionally, these parameters have been selected through empirical methods and heuristic tuning. In this work, we present a comprehensive and rigorous analysis of the error components that accumulate throughout the bootstrapping process. Focusing specifically on the parameters related to key switching, we establish a theoretical framework that supports the systematic and optimal design of these parameters. Our optimized parameter selection enables the attainment of two additional levels in widely used parameter sets, improving the efficiency of bootstrapping without compromising security or precision.

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