🎁 New User? Get 20% off your first purchase with code NEWUSER20 · ⚡ Instant download · 🔒 Secure checkout 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

SQL Injection
An attack where malicious SQL code is inserted into application queries through user input to access or manipulate the database.
OAuth 2.0
An authorization framework that allows third-party applications to access user resources without sharing passwords.
Phishing
A social engineering attack that uses fraudulent communications to trick people into revealing sensitive information or installing malware.
Vulnerability Scanning
Automated testing that identifies known security weaknesses in systems, applications, and network infrastructure.
Content Security Policy (CSP)
An HTTP security header that controls which resources a browser is allowed to load for a web page, preventing XSS and data injection.
Hashing
A one-way function that converts input data into a fixed-size string of characters, used for data integrity and password storage.
 View All Security Terms →