AWS Security Blog
Category: Technical How-to
Context window overflow: Breaking the barrier
Have you ever pondered the intricate workings of generative artificial intelligence (AI) models, especially how they process and generate responses? At the heart of this fascinating process lies the context window, a critical element determining the amount of information an AI model can handle at a given time. But what happens when you exceed the […]
Centrally manage VPC network ACL rules to block unwanted traffic using AWS Firewall Manager
Amazon Virtual Private Cloud (Amazon VPC) provides two options for controlling network traffic: network access control lists (ACLs) and security groups. A network ACL defines inbound and outbound rules that allow or deny traffic based on protocol, IP address range, and port range. Security groups determine which inbound and outbound traffic is allowed on a […]
Access AWS services programmatically using trusted identity propagation
March 7, 2025: This post was republished to update the code, architecture, and narrative introducing the launch of Single Sign-on and trusted identity propagation support for Amazon Redshift Data API with AWS IAM Identity Center. With the introduction of trusted identity propagation, applications can now propagate a user’s workforce identity from their identity provider (IdP) […]
SaaS tenant isolation with ABAC using AWS STS support for tags in JWT
As independent software vendors (ISVs) shift to a multi-tenant software-as-a-service (SaaS) model, they commonly adopt a shared infrastructure model to achieve cost and operational efficiency. The more ISVs move into a multi-tenant model, the more concern they may have about the potential for one tenant to access the resources of another tenant. SaaS systems include […]
How to create a pipeline for hardening Amazon EKS nodes and automate updates
July 16, 2024: We updated the code in this post and some of the CloudFormation parameters. Amazon Elastic Kubernetes Service (Amazon EKS) offers a powerful, Kubernetes-certified service to build, secure, operate, and maintain Kubernetes clusters on Amazon Web Services (AWS). It integrates seamlessly with key AWS services such as Amazon CloudWatch, Amazon EC2 Auto Scaling, […]
Implementing a compliance and reporting strategy for NIST SP 800-53 Rev. 5
Amazon Web Services (AWS) provides tools that simplify automation and monitoring for compliance with security standards, such as the NIST SP 800-53 Rev. 5 Operational Best Practices. Organizations can set preventative and proactive controls to help ensure that noncompliant resources aren’t deployed. Detective and responsive controls notify stakeholders of misconfigurations immediately and automate fixes, thus […]
How to issue use-case bound certificates with AWS Private CA
In this post, we’ll show how you can use AWS Private Certificate Authority (AWS Private CA) to issue a wide range of X.509 certificates that are tailored for specific use cases. These use-case bound certificates have their intended purpose defined within the certificate components, such as the Key Usage and Extended Key usage extensions. We […]
Establishing a data perimeter on AWS: Analyze your account activity to evaluate impact and refine controls
April 22, 2025: This post was updated to fix a typo in the Example 2 section. A data perimeter on Amazon Web Services (AWS) is a set of preventive controls you can use to help establish a boundary around your data in AWS Organizations. This boundary helps ensure that your data can be accessed only […]
Accelerate incident response with Amazon Security Lake
September 20, 2024: Updated the incident response life cycle related wording in the first blog of this series, so to better align with the NIST defined terms. This blog post is the first of a two-part series that will demonstrate the value of Amazon Security Lake and how you can use it and other resources to accelerate […]
How to implement single-user secret rotation using Amazon RDS admin credentials
You might have security or compliance standards that prevent a database user from changing their own credentials and from having multiple users with identical permissions. AWS Secrets Manager offers two rotation strategies for secrets that contain Amazon Relational Database Service (Amazon RDS) credentials: single-user and alternating-user. In the preceding scenario, neither single-user rotation nor alternating-user rotation would […]









