What is IAM Access Key in AWS: Simple Explanation and Usage
IAM access key in AWS is a pair of credentials consisting of an Access Key ID and a Secret Access Key. These keys allow programs or users to securely access AWS services via APIs without using a password. They work like a username and password for software to prove identity and permissions.How It Works
Think of an IAM access key as a special ID card for software or users to enter AWS services. It has two parts: an Access Key ID which is like a username, and a Secret Access Key which is like a password. Together, they prove who you are when you ask AWS to do something.
When a program uses these keys, AWS checks if the keys are valid and what permissions they have. If allowed, AWS performs the requested action, like reading data from storage or launching a server. This way, AWS keeps your resources safe by only letting trusted keys do certain tasks.
Example
This example shows how to use an IAM access key with the AWS CLI to list all S3 buckets in your account.
aws configure set aws_access_key_id YOUR_ACCESS_KEY_ID aws configure set aws_secret_access_key YOUR_SECRET_ACCESS_KEY aws s3 ls
When to Use
Use IAM access keys when you need to let software or scripts access AWS services securely without using your personal password. For example:
- Automating backups to S3 storage
- Running server applications that need to read or write data
- Connecting third-party tools to your AWS account
Always keep your secret access key private and rotate keys regularly to keep your account safe.
Key Points
- An IAM access key is a pair of credentials for programmatic AWS access.
- It includes an Access Key ID and a Secret Access Key.
- Used by software to authenticate and authorize AWS requests.
- Keep the secret key secure and never share it publicly.
- Rotate keys regularly and delete unused keys.