Updated Jul 2025
SigV4 Terminology
Security Token
Temporary, limited-privelege credentials provided by the AWS Security Token Service (AWS STS) to authenticate
IAM users.
Credentials Provider
AWS IoT Core has a credentials provider that allows you to use the
built-in X.509 certificate
as the unique device identity to authenticate AWS requests. This eliminates the need to store an access
key ID and a secret access key on your device.