What is the purpose of using trusted signers in Amazon CloudFront when accessing private S3 buckets?

Using trusted signers in Amazon CloudFront is essential for generating signed URLs that provide secured access to private S3 buckets. Trusted signers establish a mechanism through which only authorized users or accounts can create signed URLs or signed cookies needed to access the content securely. When these signed URLs are generated, they include an expiration time and a unique signature, ensuring that only users with these signed credentials can access the private content stored in S3.

This mechanism enhances security by preventing unauthorized access while still allowing flexibility in how content is shared or delivered. The signed URLs can be distributed to users, and they will only be valid for a specified duration, protecting sensitive data stored in S3.

Other options do not align with the function of trusted signers. Allowing public access contradicts the concept of private access to S3. Authenticating users and monitoring access logs are important aspects of security, but they are not the direct purpose of trusted signers in the context of signing URLs for controlled access.