OTP Verify using Cryptography and without any Database

Dependencies

This verification depends on the HMCSHA256. Computes a Hash-based Message Authentication Code (HMAC) by using the SHA256 hash function. See Details

OTP Verification process

• A hash(server end) is created with the phone number and then sent to the user as a OTP token.
• The user received the OTP via SMS.
• The user sends back the OTP token, OTP and phone number used in the first http request.
• The server verify the request and returns the response verified or not.

Diagram

Run the project

Step 1: Prerequisites

• Please make sure you have installed .NET 6 SDK. If not download here.

Step 2: Download or clone the repository

https://github.com/sodipto/.net-core-otp-verify-without-database.git

Version Information

C# 10.0
.NET 6.0