Key sharing device, key sharing method, and computer program product
US8774415B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jul 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an embodiment, a key sharing device connects to external devices with paths, and includes a key storage unit, a determining unit, a first generating unit, an encrypting unit, and a first transmitting unit. The key storage unit stores cryptographic keys to be shared. The determining unit determines a path for reaching a first device via a second device when a number of the cryptographic keys out of the cryptographic keys stored in the key storage unit is a predetermined threshold or smaller. The first generating unit generates an initial key that is a new cryptographic key to be shared with the first device. The encrypting unit encrypts the initial key by using the cryptographic key. The first transmitting unit transmits the encrypted initial key to the second device with addressing the first device as destination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.