Below you can find a step-by-step guide on how to set an access to a specific Amazon S3 bucket for a single user (a bucket user-lion in the example):

  • Go to My Security Credentials. 

  • Select Get Started with IAM Users. 

  • Select the Create Policy option in the Policy section, then select Create Your Own Policy.

  • The next step is to add a Policy Document, which will look like this:  

    *This Policy does not require editing.

    I.e. you permit to use the methods "s3:ListBucket" and "s3:GetBucketLocation" with the bucket arn:aws:s3:::${aws:username}, and "s3:PutObject", "s3:GetObject", "s3:DeleteObject", "s3:PutObjectAcl" for the all objects in that bucket.

  • At this step, you will need to go back to My Security Credentials, select the Users section and create a user who will have an access to the mentioned bucket.

  • Then, attach the previously created policy to a user.

  • When the previous step is done, go to the Users section → select the newly created user → open the Security credentials tab → select Create access key.

  • Finally, using the login information from the previous steps, a specific bucket can be accessed by a single user.