PPPhuong Phunginblog.phuongphung.com·Jan 30 · 2 min readSecurely Upload Files to S3 for Guests Using AWS CognitoFor security reasons, if you allow guest users to upload files from your app, it's better to use Guest Access from AWS Cognito instead of a direct AWS Access Key from an IAM User. Why? An IAM User access key is long-lived and never expires. With AW...00