Building a robust webhook publishing infrastructure involves implementing mechanisms to validate message integrity and prevent replay attacks, ensuring forward compatibility, and allowing zero downtime key rotation. The article demonstrates replicating Stripe's webhook signature system using Golang, focusing on creating both simple and advanced signatures while maintaining backward compatibility. Advanced signatures mitigate replay attacks by incorporating timestamps in the signed payload, and forward compatibility is achieved by versioning signatures to accommodate evolving implementations. Zero downtime key rotation is facilitated by employing multiple secrets, enabling seamless transitions between key versions. The core implementation involves a Scheme structure encapsulating active secrets and encoding methods, with the ComputeHeaderValue function generating either simple or advanced signature strings based on the Advanced flag. The solution also promotes the separation of API keys from webhook secrets to enhance security, adhering to the principle of least privilege. This implementation is integrated into Convoy's open-source and cloud platforms, with SDKs available for Ruby, Python, and Golang to facilitate adoption.