Validation describes the process of ensuring that something is being completed in the way it is meant to be completed, and by somebody who is meant to be doing that action. There are many kinds of validation involved in fraud prevention and cybersecurity, most generally in the context of log-in information being confirmed (or rather, validated) as accurate.

Velocity Filters

Velocity filters are a critical tool in fraud prevention efforts. Their function is to observe the precise information parts (such as e-mail address, telephone number, billing number and even shipping addresses) and to limit the number of transactions that a website could process in a given period of time (one hour, one day) using this information.

Velocity of Money

The velocity of money is a measurement of the rate at which money is exchanged in an economy. It is the number of times that money moves from one entity to another. It also refers to how much a unit of currency is used in a given period of time. Simply put, it's the rate at which consumers and businesses in an economy collectively spend money.

Verified by Visa (VBV)

Verified by Visa (VBV) is a free program offered by Visa that gives you an added level of protection and offers ease of mind intended for online shoppers. It is a password-protected authentication scheme intended to verify the identity of the cardholder once a Visa card is used online. By requesting a password which is recognized only by the cardholder, the bank can verify that the authentic cardholder is inflowing their card details into an e-commerce website.


A computer virus is a kind of malevolent software or a piece of code that, when executed, is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data. When this replication succeeds, the areas are then said to be "infected" with a computer virus.


Vishing, which stands for "voice-phishing", describes the fraudulent practice of making phone calls or leaving voice messages purporting to be from reputable companies in order to induce individuals to reveal personal information, such as bank details and credit card numbers. The fraudster may even utilize deepfake technology to synthetically recreate another's voice in order to pull the scheme off. Vishing attacks are generally intended to scare the victim into acting quickly, and therefore can happen within short time frames.

Voice Authorization

Voice Authorization is a security measure used by the credit card industry to ensure that a particular purchase is being authorized by the actual card-holding customer and not someone else. Merchants only incur this fee if a Voice Authorization is initiated, and for most merchants it is a rare occurrence.

Voice Over IP

Voice over Internet Protocol (VoIP), also called IP telephony, is a method and set of technologies for the transfer of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specially submit to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than through the public switched telephone network (PSTN).