---
sourceType: official-guide
sourceTypeMatchedRule: fallback
slug: MA/eKYC/signature
title: Signature
---
To verify both the data integrity and authenticity of a message.

## Mechanism

- Source server creates HMAC(SHA256) field from data and secret key.
- Destination compares the response HMAC(SHA-256) field to the HMAC value created from response data and secret key.