IAM (Identity and Access Management) mengawal siapa boleh buat apa dalam AWS — menguruskan pengguna, kumpulan, peranan, dan kebenaran. Ia adalah asas kepada keselamatan AWS: setiap tindakan diberi kebenaran melalui IAM, jadi memahaminya adalah penting.
Apa yang IAM uruskan
IAM controls AUTHENTICATION (who you are) and AUTHORIZATION (what you can do):
USERS → individual identities (people or applications) with credentials
GROUPS → collections of users (assign permissions to a group → all its users get them)
ROLES → identities ASSUMED temporarily (by users, services, or AWS resources)
— no permanent credentials; key for services/cross-account access
POLICIES → JSON documents defining PERMISSIONS (what actions on what resources)
