Abstract: A method that determines if a sender's message is to be sent to a recipient is presented. A challenge module analyzes the message and sends a challenge message to the sender if the sender is not in the recipient's address store. The challenge message includes a pseudo unique token for the sender recipient pair such that the sender must respond differently to each challenge message for a particular message. In one embodiment, the challenge message requires the sender to obtain a certificate from a certificate authority or a set of authorities.

Abstract: Integrated voice and data channel communications. Browsing and source computing devices establish a first data channel. The browser transmits its data address to the source. The source then correlates that data address to a browse session identifier that may be dialed using a telephone keypad. The source then transmits a calling mechanism along with the browse session identifier to the browser. Upon selection of the calling mechanism at the browser, a voice call is placed using the telephone number supplied with the calling mechanism. Once the voice channel is established, the appended browse session identifier is dialed. The source may use the browse session identifier to correlate the voice call to the browser's data address. The source then establishes another data channel with the browsing computing device. Then, the source may transmit update information to the browser that relates to a concurrent voice conversation.