Terminal device performing homomorphic encryption, server device processing ciphertext and methods thereof
US11101976B2 · kind B2 · utility
5Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2020 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3093
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An encryption method of a terminal device includes: setting a scaling factor; and reflecting the scaling factor in a message to be encrypted, and performing encryption using a public key to generate a homomorphic ciphertext. The homomorphic encryption is, based on a decryption being performed, in a form that a result value obtained by adding an error value to a value obtained by reflecting the scaling factor in the message is restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.