Broadcast encryption method and broadcast decryption method thereof
US8625784B2 · kind B2 · utility
2Cited by
0References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2007 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Apr 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A broadcast encryption method and a broadcast decryption method. The broadcast encryption method includes generating a message encryption key using a public key and a secret key generated by using a Strong Diffie-Hellman tuple; encrypting a message by the message encryption key; and generating a message header using a sum of a plurality of Strong Diffie-Hellman tuples corresponding to an authorized user group. Accordingly, a transmission amount and a storage amount can be reduced when a broadcast encryption message is transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.