Amazon S3 Pre-Signed URLs: Temporary Secure Access to Private Objects

Amazon S3 Pre-Signed URLs allow temporary access to private objects without making them public. This is useful for secure file sharing while ensuring the link expires after a set period.

1. Understanding S3 Pre-Signed URLs

• By default, S3 objects are private unless explicitly made public.
• Pre-signed URLs allow temporary access to a private object.
• The URL contains a cryptographic signature, proving that the requester has permission.
• Once the expiration time is reached, the URL becomes invalid.

2. Creating a Pre-Signed URL

Option 1: Using the AWS Management Console

1. Go to the S3 Console and select a private object (e.g., coffee.jpg).
2. Click on Object Actions → Share a pre-signed URL.
3. Choose an expiration time (e.g., 5 minutes).
4. Click Create Pre-Signed URL.
5. Copy the URL and share it.

✅ Now, anyone with the URL can access the file until it expires.

Option 2: Using AWS CLI

1. Open your terminal or command prompt.