Whatsapp seminar

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Whatsapp

Transcript of Whatsapp seminar

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Whatsapp

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Index

Introduction History Protocol used Language used Security Textsecure Mechanism when Offline Limitation

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Whatsapp ?

Is an instant messaging app for smartphone Cross platform app, uses the internet to send text , image ,

location and videos In January 2015 , whatsapp was the most globaly popular

messaging app with more than 700 million active users Available for Android , iPhone , BlackBerry, Symbian , and

Windows Phone Whatsapp Inc. based in Mountain view , California , was

acquired by Facebook on February 19, 2014 for approx. US $22 billion

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History

Whatsapp Inc. was founded in 2009

Founded by Brian Acton and Jan Koum , employee of Yahoo

Koum immediately choose the name whatsapp, it sound like whats up..

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Protocol Used - XMPP

XMPP – Extensible messaging and presence protocol

Based on XML

XMPP is based on Client server architecture

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XMPP architecture

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Language - erlang

Whatsapp server is implemented on erlang Server system that do backend message routing are done

in erlang

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Security

Till May 2011, Whatsapp message were not secure

data was sent and received in plaintext

On November 18, 2014, Open Whisper System announced a partnership with Whatsapp to provide end-to-end encryption

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Text Secure

TextSecure is a free and open-source  encrypted instant messaging application for Android

It uses end-to-end encryption

Text secure uses  Off-the-Record Messaging(OTR) protocol for encryption

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Mechanism when offline

All message are queued on the server until the client reconnect to retrieve message.

Message are wiped from the server memory as soon as the client has accepted the message

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Limitation

Needs your phone to be on and connected to the internet:

Not completely Free

No sign-out option.

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