Transferring a domain name from one company to another normally involves the use of a unique transfer authorization code, which different companies refer to as an EPP authorization code, a domain name password or an AuthInfo code. This code can be used as a protection measure against unwanted transfer attempts with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain name registrant and is provided by the current domain registrar company. It must be given to the new domain name registrar company because the transfer cannot be initiated without it. The code is case-sensitive and typically includes digits and special characters, so as to hinder unauthorized people from cracking it. Certain registrars even alter the codes of domain names registered through them after a particular amount of time for greater security.