Auth on Momo Engineering Journal/tags/auth/Recent content in Auth on Momo Engineering JournalMomo Engineering Journal/images/og-image.png/images/og-image.pngHugoen-usWed, 07 Oct 2026 01:35:45 -0600S3 Auth: SigV4, Presigned URLs, and Key Decoupling/posts/010-s3-auth-presigned-sigv4/Tue, 11 Aug 2026 23:11:16 +0000/posts/010-s3-auth-presigned-sigv4/Query-string SigV4 for presigned URLs, mandatory X-Amz-Date freshness, and decoupling gateway access/secret keys from the native auth token.