| 摘要 |
The invention relates to a method for securely transmitting data between a client and a server. A communication system 250 has a server 252 coupled to a network. The server (252) is also connected to a client A (254) through a narrowband channel A (NBCA) (258) and a wideband channel A (WBCA) (260), and to a client B (256) through a narrowband channel (NBCB) (262) and a wideband channel B (WBCB) (264). The client and server are connected over the wideband channel and security information is exchanged. Then, data to be transmitted from the server to the client is encrypted using the security information at the server prior to transmission of the encrypted data from the server to the client over the narrowband channel. <IMAGE> |
