The Secure Socket Layer (SSL) protocol is the de facto standard for secure network communication. Its support for authentication, non-repudiation, data integrity, and strong encryption makes it the logical choice for securing Ice applications.
Although security is an optional component of Ice, it is not an afterthought. The IceSSL plugin integrates easily into existing Ice applications, in most cases requiring nothing more than configuration changes. Naturally, some additional effort is required to create the necessary security infrastructure for an application, but in many enterprises this work will have already been done.