Large-word approximate homomorphic encryption
US12137158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2022 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Jan 7, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for cryptography based on 128 bit integers include: receiving a complex input, the input including a 128-bit number; encrypting by: setting an imaginary part of the input to a predetermined value; encrypting the input using a Fourier transform and a scaling factor; adding a first noise and a second noise to the encrypted input, wherein the second noise obfuscates the first noise; and decrypting by: receiving the encrypted input with added first noise and second noise; estimating a standard deviation of the first noise based on an imaginary part of the received encrypted complex input; computing a standard deviation of the second noise based on the standard deviation of the first noise and a predetermined parameter; and decrypting the encrypted message using an inverse Fourier transform, the first noise, and the second noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.