Transferring a domain name from one company to another commonly involves the use of a special transfer authorization code, which different companies refer to as an EPP key, a domain name password or an Auth-Info code. This code can be used as a security measure against unsanctioned transfers with all gTLD and with most ccTLD extensions. It can be obtained only by the owner of the specific domain name and is issued by the current registrar. It must be given to the new domain name registrar company because the transfer process cannot be started without it. The code is case-sensitive and ordinarily comprises of digits and special characters, so as to stop unauthorized people from breaking it. Certain domain name registrars even reset the codes of domains registered through them after a certain interval of time for greater security.