Sometimes this part is missing from the cipher suite string, in that case the authentication algorithm will be used for the key exchange. During the key exchange, both parties agree on the shared secret that will be used to encrypt all the traffic. The first part, ECDHE, specifies what key exchange algorithm should be used.One of the cipher suites they could end up using is ECDHE-RSA-AES128-GCM-SHA256, let us break this down and discuss all the parts: When a client connects to a server to set up a secure connection, both parties will negotiate about which cipher suite to use. We can do this by looking at a so-called cipher suite. TLS conceptsīefore we have a look at all the configuration details of the various connectors, we should discuss some of the concepts involved. If that is still too much work, or if you have other compelling reasons to stick to Tomcat’s BIO/NIO connectors, be aware that your configuration options will be limited, impacting security. If that is too much work, use the Tomcat APR connector. In short, for full flexibility and security you should use another web server, like nginx, to proxy requests to Tomcat. Please note an updated Java 8 / Tomcat 7 configuration is at the end of this blog. In this post we will explore the state of affairs regarding TLS when using Apache Tomcat, and we will try to find an optimal configuration. Since RC4 is showing more and more weaknesses, this was probably a good thing. Most vendors released security patches, lessening the need for server-side mitigations. As a countermeasure, many people started preferring RC4 ciphers. In 2011, the BEAST attack made it possible to decrypt session cookies. Over the last years, a lot has happened in SSL/TLS land.
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