Payment methods and systems based on a deceptive pin of a payment card

A server system for facilitating a transaction with a payment card of a cardholder, the server system comprising:

• a memory comprising stored instructions;
• and
• at least one processor configured to execute the stored instructions to cause the server system to perform at least:
• receiving a deceptive personal identification number (PIN) comprising a set of characters in which one character is a deceptive character, the deceptive character being different than each of a set of actual characters of an actual PIN of the payment card,
• identifying the deceptive character and a position of the deceptive character among the set of characters of the deceptive PIN,
• determining a reconstructed PIN by replacing the deceptive character with a corresponding actual character at the position in the deceptive PIN, wherein the actual character is determined based at least on a predefined mathematical expression and a predefined value for the predefined mathematical expression,
• authenticating the reconstructed PIN by matching the reconstructed PIN with the actual PIN, and
• upon successful authentication, facilitating the transaction.

A method of facilitating a transaction with a payment card of a cardholder, the method comprising:

• receiving, by a server system associated with a payment network, a deceptive personal identification number (PIN) for performing the transaction using the payment card of the cardholder, the deceptive PIN comprising a set of characters in which one character is a deceptive character, the deceptive character being different than each of a set of actual characters of an actual PIN of the payment card;
• identifying, by the server system, the deceptive character and a position of the deceptive character among the set of characters of the deceptive PIN;
• determining, by the server system, a validity of the transaction by performing at least
• accessing, by the server system, a primary deceptive character and a primary position of the primary deceptive character in a preceding transaction, the preceding transaction being a last transaction immediately prior to the transaction,
• comparing, by the sever system, the primary deceptive character with the deceptive character and the primary position of the primary deceptive character with the position of the deceptive character, and
• upon determining the primary deceptive character to be same as the deceptive character and the primary position of the primary deceptive character to be same as the position of the deceptive character, declining, by the server system, the transaction;
• upon determining successful validity of the transaction, determining, by the server system, a reconstructed PIN by replacing the deceptive character with a corresponding actual character at the position in the deceptive PIN, the actual character being determined based on a predefined value, a predefined mathematical expression and a subset of characters of the set of characters;
• authenticating, by the server system, the reconstructed PIN by matching the reconstructed PIN with the actual PIN;
• and
• upon successful authentication, facilitating, by the server system, the transaction.