Encryption device, encryption method, and information processing device
US9438423B2 · kind B2 · utility
0Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2015 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Feb 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/76
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An encryption server receives encrypted data which is encrypted by using a public key of a first user and which is added with auxiliary information calculated using a combination of a secret key and the public key of the first user and data to be encrypted. Then, the encryption server generates re-encrypted data obtained by re-encrypting the encrypted data using the auxiliary information added to the encrypted data, a public key of a second user, and encrypted information related to the secret key of the first user which is encrypted with the public key of the second user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.