According to security best practices, how should an Amazon EC2 instance be given access to an Amazon S3 bucket?

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christopher tenney · Accepted Answer

Have the EC2 instance assume a role to obtain the privileges to upload the file.

christopher tenney · Answer

Hard code an IAM user's secret key and access key directly in the application, and upload the file.

christopher tenney · Answer

Store the IAM user's secret key and access key in a text file on the EC2 Instance, read the keys, then upload the file.

christopher tenney · Answer

Modify the S3 bucket policy so that any service can upload to it at any time.

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