| 摘要 |
<p>In a wireless communications system a wireless communications unit comprises a wireless communications device 306, a back-end router 312, a cryptographic module 310 connected to the back-end router, and a front-end router 308 connected to the cryptographic module and the communications device. The wireless communications device is configured to exchange information over a single wireless communications channel. The front-end router is configured to perform at least one of sending a first data packet received at the front-end router from the communications device to the back-end router through the cryptographic module and sending a second data packet received at the front-end router from the back-end router through the cryptographic module to the communications device. A host 324 connected to the front end router can transmit and receive unencrypted data packets while a host connected to the back end router can transmit and receive encrypted data, both using the same wireless communications device 306.</p> |
