Method and apparatus for modulus refresh in homomorphic encryption
US11722290B2 · kind B2 · utility
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2References
22Claims
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Key dates
| Filing date | Feb 23, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Mar 14, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3093
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and apparatus for modulus refresh, where the method for modulus refresh of a ciphertext in homomorphic encryption includes receiving a first ciphertext corresponding to a first modulus, generating a second ciphertext by performing a blind rotation on the first ciphertext, and generating a target ciphertext corresponding to a second modulus greater than the first modulus based on the first ciphertext and the second ciphertext.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.