{
  "id": 8192722,
  "title": "IAM Explained Simply: Users, Roles, Policies and Why It Confuses Everyone",
  "url": "https://urgent.news/2026/09/18/iam-explained-simply-users-roles-policies-and-why-it-confuses-everyone",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-18T06:43:59.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/muskan_bandta/iam-explained-simply-users-roles-policies-and-why-it-confuses-everyone-1ge7"
  },
  "original_language": "en",
  "account": "AWS Identity and Access Management (IAM) is a critical aspect of AWS that beginners often find confusing. It may seem complicated due to the various terms like users, roles, policies, and groups, but IAM's core principle is straightforward: for every request in your AWS account, IAM determines if the identity (user, role, or group) is authorized to perform a specific action on a particular resource. The fundamental question IAM answers is \"Is this identity allowed to perform this action on this resource?\" Understanding this single question helps simplify the more complex details of IAM.\n\nThe key components of IAM are:\n1. Identities: These are the entities requesting access, which can be users, groups, or roles. Users represent individuals or long-lived entities with their own credentials, such as humans or fixed programs. Groups are collections of users, useful for attaching permissions to multiple people simultaneously. Roles are the most confusing yet essential part of IAM. Roles are sets of permissions that can be temporarily assumed by anything—EC2 instances, Lambda functions, or users from another account—granting them access for a short period. Unlike permanent credentials, roles are like costumes that can be worn by approved entities but do not have lasting access.\n\n2. Permissions: Permissions are defined in policies, which are JSON documents specifying whether an action is allowed or denied on specific resources. Policies are attached to identities (users, groups, or roles) and determine their access levels. The structure of an IAM policy includes a version, statements (each containing an effect, action, and resource), and often multiple lines of these statements to create complex permission sets.\n\n3. Roles: Roles are the most confusing aspect for beginners. A role is a collection of permissions that anything can temporarily assume. Roles do not have permanent credentials but provide temporary access to resources, which can be particularly useful for EC2 instances, Lambda functions, or cross-account access. This allows AWS resources to operate without long-lived credentials that could be compromised.\n\nThe confusion around IAM often stems from the overlap in terminology, but the concept is not hard once broken down. IAM answers a single, crucial question: is the identity allowed to do the action on the resource? This is achieved through policies attached to identities. Key rules to remember are that explicit Deny always overrides Allow and that there is a deny-by-default approach. It is crucial to grant permissions on a need-to-know basis rather than broadly. Roles are ideal for machines or temporary access, while users are best for humans or fixed programs. Storing access keys for services is discouraged; instead, use roles. The policy simulator tool from AWS helps verify if a specific identity can perform a given action, ensuring you do not inadvertently grant overly broad permissions. Understanding these concepts and following the principle of least privilege can make IAM much less frustrating and significantly enhance security in AWS environments.",
  "summary": "IAM is the thing every AWS beginner bounces off. It is also the thing you cannot avoid, because nothing in AWS works until IAM lets it. The confusion is not your fault: IAM has a few pieces that sound similar (users, roles, policies, groups) and the relationships between them are not obvious. Let me explain it the way I wish someone had explained it to me, with no jargon until it earns its place.…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}