Encrypting device, encrypting method, and recording medium
US9749135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
From the least significant bit of the current secret key, k bits are retrieved, obtaining a binary window sequence. A binary bit string of concatenation of the random number to the more significant bits of the window sequence is obtained if the most significant bit of the window sequence is 0, subtracting a bit string from the current secret key to obtain a new secret key, or the bit string of a complement of the base number for the window sequence in binary system is calculated if the most significant bit of the window sequence is 1, obtaining a bit string by adding a minus sign to a bit string obtained by concatenating the random number to the more significant bits of the bit string, subtracting the bit string from the current secret key to obtain a new secret key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.