What is this ?
If you need to transfer files to or from your web site securely, you will want to use Secure Copy - also known as SCP. SCP uses encryption similar to SSH (Secure Shell) to encrypt data between the client and server. This ensures that no one can intercept and view the data transmitted.
In most situations such as when authentication is required (i.e. whenever you are asked for your
password), SCP should always be used as opposed to FTP to transfer files. Regular
FTP sends your uniq name, password, and other information across the network in clear text
format. This makes it very easy for others to detect your information, and use it to do sinister
things to your account and the network.
This level of security can be extremely important if you are transferring mission critical data such as Credit Card records, client information, digital assets, or other critical and sensitive data.