• AJIT BHARATHAN
• Prof. Manjusha Tatiya

In the past few decades demand for ATMS (ANY TIME MESSAGE AND SERVICES): applications have been increased significantly. WhatsApp is a very popular mobile messaging application, which dominates today‟s mobile communication. Especially the feature of group chats contributes to its success and changes the way people communicate. The group-based communication paradigm is investigated in this work, particularly focusing on the usage of WhatsApp, communication in group chats, and implications on mobile network traffic. Recently, a calling feature was added to the application and no comprehensive digital forensic analysis has been performed with regards to this feature at the time of writing this paper. new calling feature which included the: a) WhatsApp phone numbers, b) WhatsApp server IPs, c) WhatsApp call duration, and d) WhatsApp's call termination. For the security purpose there is on/off button which is similar to Facebook. Which create 4-digit pin code on mobile. Each of your chats has its own security code used to verify that your calls and the messages you send to that chat are end-to-end encrypted. This code can be found in the contact info screen, both as a QR code and a 60-digit numbers.

"ATMS (Any Time Message and Services): A Smart and Secure Mobile Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.374-377, April-2019, Available :http://www.jetir.org/papers/JETIR1904L55.pdf

"ATMS (Any Time Message and Services): A Smart and Secure Mobile Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp374-377, April-2019, Available at : http://www.jetir.org/papers/JETIR1904L55.pdf