Google Voice scams continue to pose a risk for users of this service. Scammers continuously attempt to lure users into divulging their verification PIN code. By stealing other people's Google Voice accounts, hackers and scammers impersonate their victims by luring others into fraudulent transactions. Scammers make millions per year using other people's Google Voice accounts. How should users protect their identification and PIN codes for bank accounts, travel sites, and Google Voice accounts?

Authentication is the process that verifies the user's identity to control access to resources, prevent unauthorized users from gaining access to the system, and record user activities (to hold them accountable for their activities). It is used to authenticate users who log on to a server, ensure that software comes from a reputable source, and ensure that the person sending the message is who he says he is.

The growing scale of organizations and the more opportunities to push the boundaries have led to an upsurge in corporate fraud in recent years. Fraud can be a deceptive action taken against a company or one carried out by the company. A company could commit fraud in many ways to improve its industry reputation and defend itself from audits. On the other side, a company may become a victim of financial statement fraud, asset theft, and corruption committed by its staff members.

Most computer systems and applications use passwords as a common authentication method. The simplest way to implement authentication is to store a list of all valid passwords for each user. The downside of this method is that if the list is compromised, the attacker will know all the user passwords. A more common approach is to store the cryptographic hash value of the password phrase.