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Answer: S3 presigned URLs
The correct answer is 'B: S3 presigned URLs'. Although Amazon Cognito user pools (Option A) are necessary for employee login and authentication, S3 presigned URLs are the key feature that allows employees to share and access specific files securely and temporarily in the S3 bucket. This method ensures time-limited access without changing bucket permissions, providing a secure way to share private files.
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A company has relocated its secure files to a private S3 bucket without public access. They are developing a serverless app for employees to log in and share files securely. What AWS feature is best for secure file sharing?
A
Amazon Cognito user pool
B
S3 presigned URLs
C
S3 bucket policy
D
Amazon Cognito identity pool
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