| 摘要 |
A secure voice solution for a PDA-type device is provided. Voice data is received from the user using the device microphone and built- in media player software in the device. This data is encrypted and sent as an IP packet. The device then receives, as IP packets, encrypted voice communication from the other party in the encrypted call, which in turn are decrypted in the device and played back on a second media player running on the device. The present invention takes advantage of the device's ability to run two media players simultaneously to in effect, simulate a cellular telephone call. As a result, an encrypted call can be made with PDA-type devices such as the Blackberry® and also such calls can be made using different data paths (cellular, WiFi, Bluetooth) as the calls are made by sending and receiving data over the Internet, not as traditional cellular data signals. |
| 主权项 |
1. A computer-implemented method for establishing secure voice communications between a first communication device and a second communication device over a cellular network, comprising:
contacting, by the first communication device, a relay server to initiate a secure voice communication; receiving, from the relay server, a unique session identification (ID); transmitting a call notification from the first communication device to the second communication device, wherein the call notification includes the unique session ID; negotiating encryption between the first communication device and the second communication device; establishing an encrypted session between the first communication device and the second communication device, wherein the encrypted session is associated with the unique session ID; receiving, by the first communication device, a first voice signal from a microphone communicatively coupled to the first communication device, receiving, by a first media player in the first communication device, the first voice signal from the microphone; converting, by the first media player, the first voice signal into a first digital audio data, wherein the first digital audio data comprises a media player data format; encrypting the first digital audio data based on an encryption application executing on the first communication device to obtain first encrypted Internet Protocol (IP) packets; transmitting the first encrypted IP packets over the cellular network to the second communication device; receiving, at the first communication device, second encrypted IP packets from the second communication device over the cellular network; decrypting the second encrypted IP packets in a decryption application executing on the first communication device to obtain a second digital audio data; outputting the second digital audio data to a second media player in the first communication device; converting, by the second media player, the second digital audio data into a second voice signal; and outputting, from a speaker coupled to the first communication device, the second voice signal, wherein the first media player and the second media player operate simultaneously. |
