AWS Security Blog

Tag: Amazon S3

Top 10 security best practices for securing data in Amazon S3

With more than 100 trillion objects in Amazon Simple Storage Service (Amazon S3) and an almost unimaginably broad set of use cases, securing data stored in Amazon S3 is important for every organization. So, we’ve curated the top 10 controls for securing your data in S3. By default, all S3 buckets are private and can […]

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How to securely create and store your CRL for ACM Private CA

In this blog post, I show you how to protect your Amazon Simple Storage Service (Amazon S3) bucket while still allowing access to your AWS Certificate Manager (ACM) Private Certificate Authority (CA) certificate revocation list (CRL). A CRL is a list of certificates that have been revoked by the CA. Certificates can be revoked because […]

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Use IAM Access Analyzer to generate IAM policies based on access activity found in your organization trail

In April 2021, AWS Identity and Access Management (IAM) Access Analyzer added policy generation to help you create fine-grained policies based on AWS CloudTrail activity stored within your account. Now, we’re extending policy generation to enable you to generate policies based on access activity stored in a designated account. For example, you can use AWS […]

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Strengthen the security of sensitive data stored in Amazon S3 by using additional AWS services

October 13, 2021: We’ve added a section on redacting and transforming personally identifiable information with Amazon S3 Object Lambda. In this post, we describe the AWS services that you can use to both detect and protect your data stored in Amazon Simple Storage Service (Amazon S3). When you analyze security in depth for your Amazon […]

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Security is the top priority for Amazon S3

Amazon Simple Storage Service (Amazon S3) launched 15 years ago in March 2006, and became the first generally available service from Amazon Web Services (AWS). AWS marked the fifteenth anniversary with AWS Pi Week—a week of in-depth streams and live events. During AWS Pi Week, AWS leaders and experts reviewed the history of AWS and […]

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Review last accessed information to identify unused EC2, IAM, and Lambda permissions and tighten access for your IAM roles

AWS Identity and Access Management (IAM) helps customers analyze access and achieve least privilege. When you are working on new permissions for your team, you can use IAM Access Analyzer policy generation to create a policy based on your access activity and set fine-grained permissions. To analyze and refine existing permissions, you can use last […]

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How to use AWS IAM Access Analyzer API to automate detection of public access to AWS KMS keys

In this blog post, I show you how to use AWS IAM Access Analyzer programmatically to automate the detection of public access to your resources in an AWS account. I also show you how to work with the Access Analyzer API, create an analyzer on your account and call specific API functions from your code. […]

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IAM Access Analyzer makes it easier to implement least privilege permissions by generating IAM policies based on access activity

In 2019, AWS Identity and Access Management (IAM) Access Analyzer was launched to help you remove unintended public and cross account access by analyzing your existing permissions. In March 2021, IAM Access Analyzer added policy validation to help you set secure and functional permissions during policy authoring. Now, IAM Access Analyzer takes that a step […]

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How to scale your authorization needs by using attribute-based access control with S3

August 31, 2021: AWS KMS is replacing the term customer master key (CMK) with AWS KMS key and KMS key. The concept has not changed. To prevent breaking changes, AWS KMS is keeping some variations of this term. More info. May 26, 2021: In the section “Secure your tags using an AWS Organizations service control […]

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Validate access to your S3 buckets before deploying permissions changes with IAM Access Analyzer

AWS Identity and Access Management (IAM) Access Analyzer helps you monitor and reduce access by using automated reasoning to generate comprehensive findings for resource access. Now, you can preview and validate public and cross-account access before deploying permission changes. For example, you can validate whether your S3 bucket would allow public access before deploying your […]

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