Can My VoIP Calls Be Listened In On?

By Neil Zawacki
Updated: September 16, 2011

One of the common concerns about VoIP is the possibility of someone listening in on a phone call. This concern exists because you don’t need to tap a physical wire – you just need a protocol analyzer that can intercept the voice packets.

Here are five methods to encrypt phone calls made through VoIP:

VPN – Small businesses that have a Virtual Private Network can use the encryption feature that is built into the system to secure phone calls. One advantage of this method is everyone at the company is protected, even travelling employees who log in from a remote location.

Internal Encryption – Many VoIP providers (such as Skype) have incorporated encryption into the phone applications. The quality of the security provided varies depending on the company.

Zfone – This is a software application that you can download to protect your phone calls. One drawback is that it requires people on both ends of the phone call to install the software in order to function.

TLS and IPsec– These are two similar methods for encrypting VoIP calls. TLS focuses on keeping the data transferred between two applications secure. IPsec does the same, but also encrypts the information on the multitude of applications running on them.

SRTP – This method creates a unique encryption key for every call that is made through the system. It also has little to no effect on call quality, so you don’t have to worry about performance issues.

Featured Research
  • 8 Ways Business Travelers Can Save with VoIP

    Do you or any part of your workforce travel for work, or even telecommute? If that answer is yes, then you should be utilizing mobile VoIP. With VoIP, businesses have been found to save as much as 40% on local calls and a whopping 90% on international calling expenses. more

  • Phone System Showdown

    When it comes time to select your new phone system, one of the biggest questions that you will face is whether to go with the hot, new VoIP system or the steady and secure PBX network. There are pros and cons to each of these phone systems, and before making any purchase we highly suggest that you take the time to download and read our latest guide: Phone System Showdown: VoIP vs. PBX. more

  • Signals Your Company is Ready For Unified Communications

    Efficient and effective business collaboration is essential to company success and as you grow your business, you'll discover all the different communication methods that you NEED to stay connected with partners and customers. Implementing a Unified Communications (UC) system can save your company upwards of $920,000 a year due to increased efficiency amongst company employees. more

  • Phone System Implementation Expectations

    Providers would have you believe that implementing a new phone system is as easy as counting to three. However, while the process may not be difficult, there are steps that need to be taken to ensure that your new VoIP system is installed and implemented smoothly. Luckily, the challenges associated with upgrading your system tend to be fairly predictable. Most businesses run into the same set of problems that many others have faced before them, meaning avoiding or overcoming them is as easy as preparing ahead of time. more

  • Your Phone System and Your Bottom Line

    Businesses have been using phones to drive increases to their bottom lines for almost a century now. Telephony, much like the rest of the business world, has seen drastic changes with the increase in technological advancement. Voice Over Internet Protocol (VoIP), has enabled companies to connect with consumers at levels that have been seen as unheard of before. And trust us when we say this, it is doing wonders for the bottom line. more