Multi-point authentication for payment transactions

A method, comprising:

• receiving, by a point-of-sale (POS) terminal, a first indication that a payment account of a cardholder is associated with a mobile device of the cardholder;
• receiving, by the POS terminal, after receiving the first indication, a second indication of physical possession of a payment card by a merchant;
• receiving, by the POS terminal, a purchase request for an authorization of an exchange of funds from the payment account of the cardholder to the merchant;
• assigning, by the POS terminal, a randomized transaction identifier to the request for the authorization of the exchange of funds from the payment account of the cardholder to the merchant;
• transmitting, by the POS terminal, the request for the authorization of the exchange of funds from the payment account of the cardholder to the merchant and the assigned randomized transaction identifier;
• receiving, by the POS terminal, an indication that a randomized authentication identifier is associated with the assigned randomized transaction identifier, from a payment association, the payment association determining whether the request for the authorization of the exchange of funds is valid;
• receiving, by the POS terminal, a copy of the randomized authentication identifier through the mobile device, facilitated by the cardholder, wherein the mobile device receives the randomized authentication identifier from the payment association, the payment association determining whether the request for the authorization of the exchange of funds is valid;
• and
• receiving, by the POS terminal, validation that the received copy of the randomized authentication identifier matches the randomized authentication identifier.