HSM-Signer Service (PDF/XML Signing and Verification with KamuSM)
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A secure and scalable HSM-backed digital signature infrastructure was developed for KamuSM-compliant XML (XAdES) and PDF (PAdES) signing/verification processes. With REST APIs, PKCS#11 integration, asynchronous queue architecture, and Docker-based deployment, the solution delivered high performance, regulatory compliance, and strong operational observability.