While deploying a new automated process that receives data from an external application, a development team integrates a callback URL for triggers. They see multiple attempts that appear to send unauthorized instructions. They want a way to verify incoming events are legitimate. Which measure best ensures authenticity?
Embed a unique token inside the request headers and verify it on the receiving end
Use a newly generated self-signed certificate for each inbound connection
Reject traffic from sources that have IP addresses outside a defined list
Publish the callback address to a known public feed for broader acceptance
Token-based validation between systems using request headers or cryptographic signatures ensures authenticity and prevents spoofing. Unlike IP-based controls or self-signed certificates, shared secrets are not publicly visible and offer a consistent, secure, and verifiable mechanism to validate incoming requests. This is a best practice in modern API and webhook authentication design.
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What is a token in the context of API authentication?
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Why is token-based authentication preferred over IP-based filtering?
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How does using cryptographic signatures enhance webhook security?