Application Load Balancer (ALB) now supports version 1.3 of the Transport Layer Security (TLS) protocol, enabling you to optimize the performance of your backend application servers while helping to keep your workloads secure. TLS 1.3 on ALB works by offloading encryption and decryption of TLS traffic from your application servers to the load balancer. TLS 1.3 is optimized for performance and security by using one round trip (1-RTT) TLS handshakes, and only supporting ciphers that provide perfect forward secrecy.