# Security

For communication security between servers and clients, and between servers and other servers, you must explicitly configure SSL within EMS.

Secure Sockets Layer (SSL) is a protocol for transmitting encrypted data over the Internet or an internal network. SSL works by using public and private keys to encrypt data that is transferred over the SSL connection. Most web browsers support SSL, and many Web sites and Java applications use the protocol to obtain confidential user information, such as credit card numbers.

EMS supports SSL between the following components:

- between an EMS client and the EMS server
- between the administration tool and the EMS server
- between the administration APIs and the EMS server
- between routed servers
- between fault-tolerant servers

See SSL Protocol for more information about SSL support in EMS.

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