Transferring a domain from one company to another normally involves the use of a special transfer authorization code, which different companies refer to as an EPP key, a domain name password or an Auth code. This code can be used as a security mechanism against unauthorized transfers with all generic and with most country-code extensions. It can be obtained only by the owner of the particular domain and is provided 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 traditionally comprises of numbers and special symbols, so as to hinder unauthenticated people from hijacking it. Certain domain name registrars even alter the codes of domain names registered through them after a particular period of time for greater security.