IAM roles

IAM roles are a secure way to grant permissions to entities that you trust. Examples of entities include the following:

  • IAM user in another account

  • Application code running on an EC2 instance that needs to perform actions on AWS resources

  • An AWS service that needs to act on resources in your account to provide its features

  • Users from a corporate directory who use identity federation with SAML

IAM roles issue keys that are valid for short durations, making them a more secure way to grant access.

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