Transferring a domain from one company to another ordinarily entails the use of a unique authorization code, which different registrar companies refer to as an EPP authentication code, a domain password or an AuthInfo code. This code can be used as a security measure against unauthorized transfers with all generic and with most country-code extensions. The code can be obtained only by the owner of the given domain name and is issued by the current registrar. It must be given to the new domain registrar company because the transfer process cannot be started without it. The code is case-sensitive and generally contains numbers and special characters, so as to impede unauthenticated individuals from cracking it. Some registrars even alter the codes of domains registered through them from time to time for better safety.