A. Use the AWS SDK to upload the images to the S3 bucket directly from the on-premises system. Create an IAM user. Attach the user to a policy that includes the s3:PutObject permission. Configure the on-premises system to use the generated access key and secrets to authenticate access to AWS.
B. Use the AWS SDK to upload the images to the S3 bucket directly from the on-premises system. Create an IAM role. Attach the role to a policy that includes the s3:PutObject permission. Configure the on-premises system to use the AssumeRole functionality in the AWS SDK to authenticate access to AWS.
C. Use S3 presigned URLs to upload the images to the S3 bucket directly from the on-premises system. Generate the presigned URLs by using an AWS Lambda function and a private REST API endpoint. Create an AWS Site-to-Site VPN connection between the on-premises network and the VPC to allow the on-premises system to call the API to receive the presigned URLs.
D. Use S3 presigned URLs to upload the images to the S3 bucket directly from the on-premises system. Generate the presigned URLs by using an AWS Lambda function and a public REST API endpoint. Secure the API by adding an Amazon Cognito authorizer. Create a user for the on-premises system to use for authentication to call the API to receive the presigned URLs.