ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

VoIP Security Factors

Updated on March 15, 2011

Security - the new challenge

As the use of VoIP becomes more and more prevalent, network administrators are beginning to take security more seriously. Previously, due to the low adoption of VoIP technologies in general, attacks specially targeting Internet based calls were something of a rarity. It's a dubious tribute to the growing popularity of VoIP that such attacks are now far more frequent and are becoming increasingly innovative by the day.

In this article, we won't talk about internal threats such as a disgruntled employee providing access to a compromised system. Stringent administrative procedures will take care of the vast majority of such cases - such as disabling an employees VoIP account when they no longer work with the firm. Instead, we discuss external threats, where the point of attack can occur, and what we can do about it. In addition, we also look at the distinction between an attacker and an entity such as the government which can listen in legally to people's conversations.

VoIP Security
VoIP Security

VoIP and Security

Compared to the traditional telephone system, attacking a VoIP set up is both easier and more difficult. It depends on the type of attack as well as the sort of system being targeted. For purposes of this article, we look at attacks which aim to listen in on telephone conversations rather than DDoS or gaining unauthorized access to make fraudulent voice calls. When it comes to listening in, it's much easier for an attacker vis a vis a PSTN system.

For one, digital packets can be perfectly replicated unlike analog signals through which attackers give themselves away since various "clicks" and other disturbances may be heard by the user. Additionally, these packets can be eavesdropped on at any one of the many transit points - such as routers. Law enforcement agencies will find it very easy to listen in on VoIP communications since all your Internet traffic is routed through the ISP anyway even with small business hosted VoIP solutions.

This sort of listening in can be thwarted using heavy encryption. However, recent advances indicate that it might be possible to guess certain phrases even through encrypted traffic. Nonetheless, encryption remains a very powerful tool for obfuscating VoIP traffic and many governments have tried to prevent it from taking place at all.

A Virtual Private Network (VPN) is a great security measure provided you trust the server at the other end. Such security is almost impossible to break through and pretty much removes the possibility of a man in the middle attack being successful. Contact your provider of SIP Hosted PBX services to find out what security measures they have in place to secure your communications.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)