Can wifi admin see viber messages

Question

Can a wifi admin can see viber messages?

And how far or detailed can a wifi admin see, like pictures sent through viber?

Answer 1

Obviously the answer was yes.

it could be achieved using special plugin :

from wireshark forum

Capture setup is possibly not ready for wifi/wlan capturing. Please read the wiki about capturing traffic in such an environment: http://wiki.wireshark.org/CaptureSetup/WLAN

    I am NOT able to detect the VoIP call being made on these smartphones (using the smartphone app Viber).

well, even if see the wifi/wlan traffic of the phones, you may not be able to capture 'voip' calls made via viber.com. I don't know for sure, but I'm pretty confident, that they will use their own protocol and I hope they will use encryption, otherwise I would consider viber.com a security failure and not a service ;-). Unfortunately both issues (own protocol and encryption) will make it hard/impossible to extract any valuable information from the captured packets. Anyway, you will see how far you get, as soon as your wlan/wifi capture setup works.

HINT: wifi monitoring mode (see wiki) is not supported on Windows with WinPcap, so if you want to capture the wifi/wlan traffic of your android phones you either have to use a special adapter on Windows (AirPcap) or use Linux as the platform for Wireshark.

UPDATE
Please read the following paper regarding viber security. It explains some concepts (protocol,'encryption/scrambling', etc.)

    https://www.os3.nl/2011-2012/students/jeffrey_bosma/courses/ssn/assignments/project

Apart from that there were many spy plugins available to detect it ,Apart from above have a look over heredetailed tutorial how system adminstrator will spy over u

Answer 2

Can a wifi admin can see viber messages?

A network administrator will be (probably) be able to see there is traffic to Viber.

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Are my messages secure?

Yes, but.

• Viber messages are supposed to be encrypted. However, there have been a number of bugs in the past, for example see Viber begins fixing image-encryption vulnerability. There may still be (undiscovered) bugs in the encryption.

• In addition, your messages are only as secure as your device. If you lose your phone/laptop or someone hacks your PC all bets are off.

• I would not use a messaging app to transfer private/confidential information (for example embarassing photos, your banking details, etc).

Sending your messages online means trusting the application you send them through and it's important you know exactly what kind of security measures are taken to keep your information private. With Viber, your messages are secure.

All text messages sent through Viber on its supported platforms are encrypted. Media messages, such as photos and videos, are encrypted on Viber for iOS, Viber for Android, Viber for Windows 8 and Viber for Windows Phone 8.

What does "encrypted" mean?

Encrypted data refers to data that is taken in its original form and converted into code or other data in order to conceal the original content. In other words, data encryption takes your messages and turns it into a bunch of garble that cannot be deciphered.

Source Are my messages secure?