🎁 New User? Get 20% off your first purchase with code NEWUSER20 Register Now →
Menu

Categories

Security Intermediate

What is Webhook Signature Verification?

A security mechanism that verifies webhook payloads are authentic and unmodified using cryptographic signatures.

Webhook signature verification ensures incoming webhook requests genuinely come from the expected service and have not been tampered with. The sender creates a signature (HMAC-SHA256) using the payload and a shared secret, included in a header.

The receiver recalculates the signature using the same secret and compares. If they match, the webhook is authentic. Services like Stripe (Stripe-Signature), GitHub (X-Hub-Signature-256), and PayPal use this pattern. Always verify signatures to prevent spoofed webhook attacks.

Related Terms

Penetration Testing
An authorized simulated cyberattack on a system to evaluate its security defenses and identify vulnerabilities.
Data Loss Prevention (DLP)
A strategy and set of tools that detect and prevent unauthorized transmission of sensitive data outside an organization.
SIEM (Security Information and Event Management)
A platform that collects, correlates, and analyzes security events from across an organization to detect threats and incidents.
Input Validation
The process of verifying that user-supplied data meets expected formats, types, and ranges before processing it.
Security Hardening
The process of reducing a system's attack surface by disabling unnecessary services, applying patches, and configuring security controls.
Man-in-the-Middle Attack
An attack where the attacker secretly intercepts and potentially alters communication between two parties who believe they are communicating directly.
 View All Security Terms →