CloudFront预签名

CloudFront Signed URLs - Know what is the purpose of CloudFront signed URLs and how they differ from S3 presigned URLs or CloudFront signed cookies.

CloudFront Signed URLs

A signed URL includes additional information, for example, an expiration date and time, that gives you more control over access to your content. This additional information appears in a policy statement, which is based on either a canned policy or a custom policy. The differences between canned and custom policies are explained in the next two sections.