New Delhi, Nov. 19 -- Zoho co-founder Sridhar Vembu announced that Arattai will activate end-to-end encryption, starting the night of November 18 IST. The update marks one of the app's most significant security shifts as it works through an early surge in downloads followed by a visible dip in active users.

Vembu urged users to update the Arattai app from the Play Store or the App Store. Once updated, users will be redirected to a new encrypted chat session. Those on the older version can continue using the previous chat sessions for a three-day transition period. After this window, all conversations will shift to encrypted sessions, and older chats will be archived.

The company plans to introduce encryption for group chats in the comin...