AWS Identity and Access Management and Features of IAM User

Introduction
 

AWS Identity and Access Management (IAM) is a service under the AWS hood to let you control AWS resources in a secured manner. An organization deploys different resources according to the services. IAM lets you control the authentication and authorization (permission) for using these resources. At the launch of AWS, you have a single sign-in identity for complete access to AWS services and resources. We call this identity as AWS root user. You can access it via the same credentials you used for creating the AWS account.

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Identity and Access Management  Features

Granular Permissions

A unique feature to give distinctive permissions to people for different resources.

E.g., you allow a user complete access to Amazon EC2, Amazon S3, and dynamo DB for other users you allow only read access to amazon EC2 only nothing else so these users access resources according to their permissions.

Secure access to AWS resource

IAM credentials let you access other AWS resources through secure access to your application.

eg. S3 buckets, dynamo DB

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Multi-factor Authentication (MFA)

Add an extra layer of security with multi-factor authentication. 

E.g., You have to enter a unique code generated and sent to your configured device along with your password

IAM main resources

• IAM users
• IAM groups
• IAM roles 
• IAM policies

• IAM users are generally a physical entity like us. We use it to refer a person or service who interacts with AWS through it.
• IAM groups comprising of users are formed to specify permissions for that lot. A group called admins will have every type of permissions administrators will require. When a new user joins the organization, they can be assigned the admin permissions by simply getting added to that group.
• IAM roles are given to machines. Similar to a user, these roles are for internal usage within AWS resources or services. Users are going to be a physical person.
• IAM Policies are written in JSON documents, which define what each of the above can and cannot do.

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