Page 9 - Informatics, July 2020

IN FOCUS

Content Delivery Network (CDN)
e Pass

API Gateway

Security Gateway
(Firewall, DDoS, WAF)

Load Balancer
Aarogya Setu App Backend Servers

through which millions of SMSs have been sent metros and other public places, to ascertain the
to the users. The static content of the app is host- health status of the individuals entering/exiting
ed on a content delivery network, so as to facili- the premises.
tate faster response times for the end users. The
back-end is also integrated with ICMR and e-pass How the App works
systems.
The Aarogya Setu app on a user’s phone de-
Aarogya Setu has recently introduced QR Code tects other devices that have the Aarogya Setu
Dashboard Report SMS Gateway feature, which can be scanned to know the health app when they come within the Bluetooth prox-
Bluetooth Proximity
and Modelling status of an individual. This feature ensures that imity of your phone. When this happens, both
Date wise bluetooth suspects marked by AS and number of users turned icmr positive. Trend shows
the real time status of the health of a citizen is the phones securely exchange a digital signature
Positive user percent share of suspe
shown to the QR scanning app. This QR Code cts of this interaction, including time, proximity, lo-
Technical Architecture once generated is valid for 45 minutes and it can cation and duration. This data is stored on the
be used at the entry/exit points of offices, malls, device of the respective Users in an encrypted

form would prompt the citizens with the same
questions and in the same format as the Aarog-
ya Setu app, thereby enabling them to complete 33.2 33.1
their self-assessment. This IVRS service is avail- 300k 30.5 30.7 29.3 33.2
able in 12 languages. After the self-assessment, 30.7
users get a summary of their health condition 25.6 25.8 26.8
on SMS. Those who report that they are unwell 25.1 25.8 25.9
through their self-assessment also get calls from 200k 20
the Government for medical assistance.

Technical Architecture Total suspect
100k 10
Aarogya Setu’s front-end and back-end archi- Total tested
tecture is very robust and highly scalable. The Total positive
architecture can seamlessly handle hundreds
of millions of requests. The user requests to the 0 Aa Positive %
backend are validated using an ‘Authorization Jun 12 Jun 15 Jun 18 Jun 21 Jun 24 Jun 27
Token’. The backend is protected by a security 2020
gateway, which blocks DDoS attacks, hacking at- Total Total Total
tempts etc. The app leverages NIC’s SMS gateway, Figure-1 Bluetooth Proximity suspect tested positive

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