|User||User||A RAM user under an account|
|Group||Group or user group||A RAM user group under an account|
|Policy||Authorization policy||A language used to describe policies|
|AK (AccessKey)||Access key||An AK is composed of AccessKeyID and AccessKeySecret, and is used for identity authentication in Alibaba Cloud service API requests|
|MFA (Multi-Factor Authentication)||Multi-Factor Authentication||You can associate your account or RAM users with MFA devices to enhance security.|
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