Enable S3 Transfer Acceleration for the bucket and use its endpoint for customer requests, maintaining S3 signed URLs.

Create a CloudFront distribution with the S3 bucket as origin, direct requests to CloudFront, and use CloudFront signed URLs.

Establish a secondary S3 bucket in eu-central-1, replicate across regions, and direct requests to the nearest region, using S3 signed URLs.

Adapt the web application for dataset streaming, read from the S3 bucket, and manage access control within the application.