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WhatsApp Seminar report



WhatsApp Messenger is a proprietary, cross-platform instant messaging application for smart phones. In addition to text messaging, users can send each other images, video and audio media messages. The client software is available for iOS, BlackBerry OS, Android, Symbian, Series 40, and Windows Phone. Competing with a number of Asia-based messaging services WhatsApp handles two billion messages per day as of April 2012, growing from one billion in October 2011. According to the Financial Times, WhatsApp "has done to SMS on mobile phones what Skype did to international calling on landlines."
WhatsApp uses a customized version of the open standard Extensible Messaging and Presence Protocol (XMPP) Upon installation, it creates a user account using one's phone number as the username (Jabber ID: [phone number]@s.whatsapp.net). WhatsApp software automatically compares all the phone numbers from the device's address book with its central database of WhatsApp users to automatically add contacts to the user's WhatsApp contact list. Previously the Android and S40 versions used an MD5-hashed, reversed-version of the phone's IMEI as password, [15] while the iOS version used the phone's Wi-Fi MAC address instead of IMEI. A 2012 update now generates a random password on the server side.





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