AWS Security Blog

Tag: Transport Layer Security

AWS Certificate Manager

AWS Certificate Manager will discontinue WHOIS lookup for email-validated certificates

AWS Certificate Manager (ACM) is a managed service that you can use to provision, manage, and deploy public and private TLS certificates for use with Amazon Web Services (AWS) and your internal connected resources. Today, we’re announcing that ACM will be discontinuing the use of WHOIS lookup for validating domain ownership when you request email-validated […]

Faster AWS cloud connections with TLS 1.3

Faster AWS cloud connections with TLS 1.3

June 10, 2024: This blog post is updated to announce that TLS 1.3 is available on our AWS service API endpoints across each of our AWS Regions. January 12, 2024: Over 80% of AWS service API endpoints now support TLS 1.3, along with TLS 1.2. The remaining services are in progress on adding TLS 1.3 […]

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

January 30, 2024: The API in this blog post has been changed in newer version of the AWS CRT Client. See this page for more info. 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 […]

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

February 27, 2024: AWS has completed our global updates to deprecate support for TLS 1.0 and TLS 1.1 versions on our AWS service API endpoints across each of our AWS Regions and Availability Zones. January 17, 2024: Over 96% of AWS service API endpoints have ended support for TLS versions 1.0 and 1.1. Over the […]

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 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 […]