Source: voipcentral.org

The VoIP networks happen to be quite unsafe this has been pointed out recently. The financial services industry whose data happens to be quite sensitive is the most unsafe.
The biggest threats to VoiP happen to be are viruses and denials. The important aspect turns out be IP network security.
The important security measures include encryption of voice traffic, configuring firewalls and choosing VoIP service provider which offers compatibility with existing firewall.
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Source: voipcentral.org

Wireless security provider Columbitech has claimed to have just launched the first secure WiMAX-Ready VPN, enabling secure connection and seamless roaming to wireless broadband technology across any network supporting TCP/IP. According to Columbitech, acceptance testing of the new version of WiMAX-ready Columbitech Wireless VPN will be done in cooperation with leading WiMAX equipment suppliers.

The WiMAX-ready Columbitech Wireless VPN (WVPN), a session based security solution, provides users with a seamless and secure connection without having to constantly manually log-in. For example, a user can log on to a corporate network from home using Wi-Fi or any broadband connection available such as ADSL. The user can then travel to the airport, where the secure WVPN session to the corporate network can be resumed over the airport Wi-Fi network as soon as the laptop session has been resumed from hibernation. There is no need for the user to log in again, as the mutual authentication of the secure session is performed in the background and requires no user intervention.

Columbitech Wireless VPN also provides secure connections and seamless roaming across networks like GSM, 3G, Bluetooth and Wi-Fi. Amongst all these networks, Columbitech Wireless VPN both encrypts the transmitted data and offers various methods of user authentication to eliminate unauthorized access.

Company Link: Columbitech