Key Reduction in Multi-Key and Threshold Multi-Key Homomorphic Encryptions by Reusing Error

• Published in: IEEE access Vol. 11; pp. 50310 - 50324
• Main Authors: Koo, Zahyun, Lee, Joon-Woo, No, Jong-Seon, Kim, Young-Sik
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Clients; Cloud computing; Costs; Errors; Homomorphic encryption; Homomorphic encryption (HE); Lattices; multi-key homomorphic encryption (MKHE); Multiplication; Outsourcing; Public key; ring learning with error (RLWE); Rotation; Servers; threshold multi-key homomorphic encryption (TMKHE)

As cloud computing and AI as a Service are provided, it is increasingly necessary to deal with privacy sensitive data. To deal with the sensitive data, there are two cases of outsourcing process: i) many clients participate dynamically ii) many clients are pre-determined. The solutions for protectin...