The most secure way to sign a transaction is to do it locally with a signing library, such as [RippleAPI](reference-rippleapi.html). Alternatively, you can sign the transaction using the [`sign`](reference-rippled.html#sign) command, but this must be done through a trusted and encrypted connection, or through a local connection, and only to a server you control.

In all cases, note the signed transaction's identifying hash for later.