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Enhancing Secure Access with Amazon S3 Pre-signed URLs
Amazon S3 pre-signed URLs provide a secure way to grant temporary access to specific S3 objects without having to modify bucket policies or permissions. Whether you’re sharing a file with a limited audience, allowing temporary file uploads, or managing dynamic access, pre-signed URLs offer a flexible solution. This article explores how to generate pre-signed URLs using the S3 Console, AWS CLI, and SDK, and covers expiration settings and common use cases.
What are Pre-signed URLs?
Pre-signed URLs allow you to generate a unique URL that grants temporary access to an object in your S3 bucket. The user who receives the URL can perform the allowed operation (such as GET or PUT) within the time window specified in the URL’s expiration. This feature is ideal when you need to grant short-term, fine-grained access without altering your bucket’s permissions.
How Pre-signed URLs Work
When you create a pre-signed URL, it inherits the permissions of the user or role that generates it. If a user has permission to upload or download an object, they can generate a pre-signed URL that allows others to perform the same action. The access is controlled by an expiration time, which makes the URL invalid after a specified period.
