Transferring a domain name from one registrar company to another ordinarily entails the use of a unique domain name 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 unapproved transfer attempts 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 company. It must be given to the new domain registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and usually contains numbers and special symbols, so as to stop unauthenticated individuals from deciphering it. Some registrars even alter the codes of domain names registered through them once in a while for better security.