Stands for 2-factor authentication. When a user wants to access a website or app, they need to provide a single piece of authentication (SFA) in the form of a password. Adding another method is called 2-factor authentication, and it improves security. You will also hear the name multi-factor authentication. Authentication factors can include facial scans, ID cards, SMS confirmations, security tokens, or biometric fingerprints, amongst others. According to Google, 2FA helps reduce 66% of targeted attacks, and 99% of bulk phishing attacks.
A security protocol designed for online credit and debit card transactions. It is designed as an additional password validated by the issuer, which helps transfer liability to the customer in case of fraud. 3D refers to three domains where the information is checked: issuer domain (where the money is taken from, acquirer domain (where the money is going to), and interoperability domain (the whole payment infrastructure, including software, merchant plugin, card scheme, servers, etc…).The newest version of the protocol, 3D Secure 2.0, adds more data points like device and IP. As of late 2019, it has yet to be implemented by all merchants and issuers.
The fraudulent practice of creating and maintaining multiple accounts with a platform in order to resell them later. Very popular with social media sites. See also: Bot attacks