Transferring a domain from one company to another normally involves the use of a special 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 unauthorized 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 registrar company because the transfer cannot be initiated without it. The code is case-sensitive and commonly includes numbers and special characters, so as to obstruct unauthorized persons from cracking it. Certain domain name registrars even reset the codes of domains registered through them from time to time for better safety.