Five protocols are supported: HTTP, SVN, HTTPS, SVN + SSH and FILE. If the repository that you are trying to access is password protected, the Enter authentication data dialog requests a user name and a password. If the Store authentication data checkbox is checked, the credentials are stored in Subversion's default directory:

There is one file for each server that you access. If you want to make Subversion forget your credentials, you can use the Reset authentication command from the Options menu. This causes Subversion to forget all your credentials.

Note: When you reset the authentication data, restart the application in order for the change to take effect.
Tip: The FILE protocol is recommended if the SVN server and Syncro SVN Client are located on the same computer as it ensures faster access to the SVN server than the other protocols.

For HTTPS connections where client authentication is required by your SSL server, you must choose the certificate file and enter the corresponding certificate password which is used to protect your certificate.

When using a secure HTTP (HTTPS) protocol for accessing a repository, a Certificate Information dialog pops up and asks you whether you accept the certificate permanently, temporarily or simply deny it.

If the repository has SVN+SSH protocol, the SSH authentication can also be made with a private key and a pass phrase.

User & Private key authentication dialog

After the SSH authentication dialog, another dialog pops up for entering the SVN user name that accesses the SVN repository. The SVN user name is recorded as the committer in SVN operations.