Transferring a domain from one company to another traditionally entails the use of a unique transfer authorization code, which different registrar companies call an EPP authentication 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 owner of the specific domain name and is issued by the current domain name registrar company. It must be given to the new registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and frequently comprises of numbers and special symbols, so as to impede unauthenticated individuals from cracking it. Certain registrar companies even change the codes of domains registered through them after a particular period of time for even greater security.