Yes, messaging apps like WhatsApp and Telegram can be used for OTP (One-Time Password) authentication, though their implementation and capabilities differ significantly. Below is a detailed breakdown:

1. WhatsApp OTP for Authentication

WhatsApp is widely adopted for OTP delivery due to its end-to-end encryption, global reach, and user-friendly interface. Here’s how it works:

• Security: WhatsApp OTPs are encrypted, making them more secure than traditional SMS or email OTPs, which are vulnerable to phishing or interception .
• Delivery: Businesses use the WhatsApp Business API to send OTPs via pre-approved message templates. Users receive the code directly in their WhatsApp app, often with auto-fill functionality .
• Use Cases:
  • Account registration and login verification .
  • Password resets and transaction confirmations .
  • Appointment confirmations and secure document access .
• Advantages:
  • Higher engagement and read rates compared to SMS .
  • Cost-effective for businesses, especially in regions with high SMS costs …