Originally published on rohitraj.tech
1 in 5 Indian families have been hit by UPI fraud. 51% never report it. Cloud-based scam checkers need internet — exactly what victims in Tier 2/3 India don't have. Here's why I built ScamRakshak with zero network permissions.
Read the full version with code samples, diagrams, and architecture details: ₹805 Crore Lost to UPI Fraud This Year. I Built an Offline Scam Detector That Needs Zero Internet.
More engineering notes: rohitraj.tech/notes
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