Blogs on System Administration, Scripting, System Monitoring, Cloud Computing & Virtualizaton, VoIP Systems, SMS Systems and Web Applications Development.

Techniques for VoIP Calls Security


The purpose of this article is to outline the possible solutions for fraud prevention in Call Center environment. The fraud prevention techniques for Call Center mainly includes the identification of spoofed Caller IDs, malicious behavior and legitimate callers by analyzing the full audio of phone calls via voice bio-metrics, behavioral analysis and matching the patterns with already developed database of spam users or devices.

The probability of Contact Center fraud is high for the environments where VoIP Servers has public interface which is open to internet, whereas the network closely packed with IPSec VPN tunnels with vendors and clients, have legitimate sources for VoIP traffic, which reduces the chances of fraud from any illegitimate IP Address or Device.


Following are the components/techniques that can be developed from different libraries, tools and products in order to add another layer of security for our IVR/Agent Calls:

1. Identification of Caller ID’s Origin

There are many paid solutions for identifying origins of Caller IDs which can be considered as per their accuracy level whereas libphonenumber is an open source library maintained by Google and can be hosted or downloaded locally, which not only identifies the country and operator of a phone number but also returns phone number type (i.e. Landline, Mobile or VoIP), portable region, invalid number etc. The reference of these patterns can be verified from ITU’s numbering plans website. This library is originally developed in java but has wrappers in python, php and javascript etc.

2. Voice Biometrics

There are different vendors i.e. Nuance, Verint and Enacomm which provides paid solution of voice biometrics via audio transcriptions and are already under evaluation. These patterns of audio transcriptions of calls can be used for maintaining database of legitimate users.

3. VoIP Honeypot

A VoIP honeypot is a trap set to detect, deflect, or in some manner counteract attempts at unauthorized use of VoIP system. It will actually be a dummy IVR Server which will be isolated from production environment and will act as valuable information or resource to attackers. The spam calls can be filtered at front end proxy level and further redirected to the VoIP honeypot.


The components discussed above or one stop solution for call center fraud from market; will add an extra layer of security for preventing fraud calls but will also add a little overhead while making decisions from available databases. As these decisions will have to be taken at front end proxy level then it will require another hop before IVR Servers for such scrutiny of incoming calls.


  1. Amazing post.Thanks for your details and explanations..I want more information from your side.Thank you

    Article submission sites
    Guest posting sites

  2. I am glad to post a worthy article about the German Language Course and IELTS Coaching from KCR consultants, this may change your career growth and language skill.

  3. Online football betting i99club, one of the world's leading online gambling sites, provides the best prices in football betting

    Ufabet1688 online betting website UEFA Bet is a 100% legal website with all licenses

    UEFA football betting, casino, slots, lottery, direct website 1688, stable financial, 100% UFABET168

    Fan wreath shop with free delivery, with pictures before-after sending with receipt.

    Sticking to the COVID-19 situation:

    Online Baccarat FOXZ24 Easy to apply, fast, deposit-withdraw 10 seconds with the system

  4. FOXZ88.NET online casino website Global standard 2020-2021

    Betting online gambling reminiscent of UFASCR.COM Baccarat.

    UFABET football betting website, the big brother of all UEFA networks, UFADNA, with an update The first modern system in 2021

    Web football i99PRO online lottery casino apply today for free 5000 bonus

    Kardinal Stick Siam - Relx a great promotion. Express delivery in 3 hours.

  5. Movie-watching websites that are more than movie-watching websites Because we are the number 1 free movie site in Thailand for a long time, including new movies, Thai movies, Western movies, Asian movies, we have all kinds of ways for you Including new series Full of all stories without interstitial ads to keep annoying anymore. One place

    Android and IOS operating systems. Watch online movies, Thai movies, Western movies, Asian movies, Cartoon movies, Netflix Movie, Action Movies, Comedy Movies, Crime Movies, Drama Movies, Horror Movies, Adventure Movies, Crash Movies and still have many new movies to watch. You can watch for free anytime, anywhere 24 hours a day at

    GangManga read manga, read manga, read manga online for free, fast loading, clear images in HD quality, all titles, anywhere, anytime, on mobile, tablet, computer. Android and IOS operating systems. Read top comics, action dramas, comedy, adventure, horror and manga. New coming every day to watch many more. Can be read for free anytime anywhere 24 hours a day at

    It is no secret that football is among the most popular and widely watched sports. Everybody who likes football tries to find the best platform for free soccer streaming. So, what are the best free sports streaming sites? We are going to answer this question. On this page, you can find a detailed overview of the most widespread soccer streaming websites. Keep on reading and make the best choice for you

  6. one fast brownIn case you are looking for a good site, UFA, UEFA Bet casino site. Which can be played as a thorough answer, in a position to answer Quality and Performance It's ideal to get a great deal of the issues. It can be something very punching and fascinating. Excellently, the items that UFABET football betting is absolutely nothing even with the practical experience of quality. Plus accessibility that are able to see final results It's a model that is very sharp and also different. Full of performance of creating wealth Attractiveness With the most beneficial opportunities it is quite nothing You will find opportunities and also probabilities for making profits. Quality and also somewhat diverse For people who have come to make use of the service excellently fox

  7. quite fine broadcast. I simply stumbled upon your blog and desired to pronounce that i've in reality loved surfing your blog posts. After each ill be subscribing for your feed and i reason you write behind extra quickly! Hotspot Shield license Key

  8. เกมสล็อตออนไลน์อันดับหนึ่ง ใส่ใจการเล่นทุกบริการ เครดิตฟรีPG ฝากถอนได้ในรูปแบบอัตโนมัติ เล่นได้กับเครดิตฟรี ทำรายการต่างๆด้วยรูปแบบอัตโนมัติ เล่นได้ง่ายผ่านสมาร์ทโฟน แท็บเล็ต และคอมพิวเตอร์ ทำกำไรได้ดั่งใจ ตลอด 24 ชั่วโมง

  9. ดื่มด่ำไปกับการเล่น สำหรับสมาชิกใหม่ เล่นเกมต่างๆได้ตลอดทั้งเดือน PGฟรีเครดิต การันตีการเล่นด้วยความปลอดภัยอันดับต้นๆ ระหว่างประเทศ แจกหนัก แจกจริง เล่นได้อย่างมั่นคง ปลอดภัย เล่นได้มากกว่า 300 เกม ไม่ว่าจะเป็นสล็อต คาสิโน อาเขต

  10. megaslot พรีวิวสล็อตอัพเดทใหม่ที่สามารถทำความรู้จักกับเกมสล็อตได้อย่างเต็มที่ผ่านฟีเจอร์ลองเล่นสล็อตที่เราเตรียมไว้ให้ผู้เล่นทุกคนได้รู้จักกันเป็นอย่างดี เพื่อเพิ่มประสิทธิภาพการทำเงินอย่างเต็มที่


Please Enter your Comments Here.