Authentication Methods Supported by AWS Services
The following table lists the available AWS services and which type of authentication is supported by each.

AWS supports two types of Request Identifiers:

AWS Access Key Identifiers - Access Key Identifiers are used to calculate HMAC-SHA1 request signatures, which can be included in Query, REST, and SOAP requests.

X.509 Certificates - Alternatively, you can use an X.509 certificate for authentication of AWS requests. The certificate used must be uploaded to AWS for use with your account. You can use X.509 certificates only with SOAP requests.