https://ilham.dev/tags/signature/Recent content in Signature on ilham.devHugo -- gohugo.ioenSun, 27 Sep 2026 00:00:00 +0700https://ilham.dev/posts/how-to-check-digital-signatures-in-pdfs/Sun, 27 Sep 2026 00:00:00 +0700https://ilham.dev/posts/how-to-check-digital-signatures-in-pdfs/A PDF digital signature is cryptographic metadata. It is not the same thing as an image of a handwritten signature placed on a page. The PDF Signature Checker tool gives me a safe place to test the idea before I put it into a script, server, or production workflow.https://ilham.dev/posts/how-to-understand-snap-bi-asymmetric-signature/Sun, 27 Sep 2026 00:00:00 +0700https://ilham.dev/posts/how-to-understand-snap-bi-asymmetric-signature/SNAP BI signatures can feel confusing because they combine several ideas at once: HTTP method; URL path; request body hash; timestamp; RSA private and public keys; a signature header. When all of those appear together, it is easy to get lost.