AWS Security Blog

Tag: TLS

How to evaluate and use ECDSA certificates in AWS Certificate Manager

AWS Certificate Manager (ACM) is a managed service that enables you to provision, manage, and deploy public and private SSL/TLS certificates that you can use to securely encrypt network traffic. You can now use ACM to request Elliptic Curve Digital Signature Algorithm (ECDSA) certificates and associate the certificates with AWS services like Application Load Balancer (ALB) […]

Amazon introduces dynamic intermediate certificate authorities

October 7, 2022: This blog post has been updated to include a Frequently Asked Questions section at the end. September 30, 2022: This blog post has been updated to include the addition of the CN=Starfield Services Root Certificate Authority – G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=US root in the Amazon Trust Services root CA certificate chart. AWS Certificate […]

How to tune TLS for hybrid post-quantum cryptography with Kyber

January 25, 2023: AWS KMS, ACM, Secrets Manager TLS endpoints have been updated to only support NIST’s Round 3 picked KEM, Kyber. s2n-tls and s2n-quic have also been updated to only support Kyber. BIKE or other KEMs may still be added as the standardization proceeds. August 3, 2022: This post has been updated to include […]

TLS 1.2 to become the minimum TLS protocol level for all AWS API endpoints

January 9, 2023: This post was updated with more references in the “What if I can’t update my client software?” section. November 11, 2022: This post was modified to update that Amazon Athena can now be used to query CloudTrail for the TLS values, and to add a link to our AWS re:Inforce 2022 presentation […]

How to use ACM Private CA for enabling mTLS in AWS App Mesh

Securing east-west traffic in service meshes, such as AWS App Mesh, by using mutual Transport Layer Security (mTLS) adds an additional layer of defense beyond perimeter control. mTLS adds bidirectional peer-to-peer authentication on top of the one-way authentication in normal TLS. This is done by adding a client-side certificate during the TLS handshake, through which […]

Use ACM Private CA for Amazon API Gateway Mutual TLS

October 5, 2021: In the section “Retrieving your ACM Private CA root CA certificate public key,” in step 4, we’ve updated the formatting of the commands to indicate placeholder text. May 14, 2021: In the section “Retrieving your ACM Private CA root CA certificate public key,” in step 1, we updated the command to include […]

How to confirm your automated Amazon EBS snapshots are still created after the TLS 1.2 uplift on AWS FIPS endpoints

We are happy to announce that all AWS Federal Information Processing Standard (FIPS) endpoints have been updated to only accept a minimum of Transport Layer Security (TLS) 1.2 connections. This ensures that our customers who run regulated workloads can meet FedRAMP compliance requirements that mandate a minimum of TLS 1.2 encryption for data in transit. Attempts […]

TLS 1.2 will be required for all AWS FIPS endpoints beginning March 31, 2021

November 10, 2022: This project was successfully completed in March 2021. TLS 1.2 is now the minimum version supported for all connections to AWS FIPS service endpoints. Note we will be implementing the same policy for non-FIPS endpoints by June 2023. If you also use these endpoints see https://aws.amazon.com/blogs/security/tls-1-2-required-for-aws-endpoints/ for details. To help you meet […]

Over 70 services require TLS 1.2 minimum for AWS FIPS endpoints

March 18, 2021: This post was originally published in February 2021. Since then, the number of services that require a TLS minimum of 1.2 has grown from over 40 to over 70. We’ve updated this post accordingly. In a March 2020 blog post, we told you about work Amazon Web Services (AWS) was undertaking to […]

Round 2 post-quantum TLS is now supported in AWS KMS

January 25, 2023: AWS KMS, ACM, Secrets Manager TLS endpoints have been updated to only support NIST’s Round 3 picked KEM, Kyber. s2n-tls and s2n-quic have also been updated to only support Kyber. BIKE or other KEMs may still be added as the standardization proceeds. AWS Key Management Service (AWS KMS) now supports three new […]