Financial transactions with dynamic personal account numbers

A construction and operation method for securing payment card financial transactions in a secure financial transaction network and payment infrastructure, comprising:

• associating a personal account number (PAN) with a particular payment card and user by embossing and magnetically recording on said payment card fields for a system number, a bank/product number, a user account number, and a check digit;
• associating an expiration date with said PAN by embossing and magnetically recording on said payment card;
• encoding a magnetic stripe disposed on said payment card with a magnetic data recording to represent said PAN for periodic electronic reading by a magnetic card reader during a card-present financial transaction with a merchant terminal;
• electronically storing data for a table of cryptographic values associated with said PAN on each user's payment card during personalization;
• electronically sensing a financial transaction being commenced with the payment card with the use of a swipe sensor;
• separating in time a current financial transaction with a merchant terminal from a next, new financial transaction, with an electronic timer disposed in said payment card, and triggered by a user input;
• electronically presenting a current variable part of said PAN on the user display only during a current financial transaction with said merchant terminal;
• electronically presenting a new, next variable part of said PAN on said user display only during a next, new financial transaction with any merchant terminal;
• imposing an electronic limit on how frequently a new, next variable part of said PAN can be electronically generated and presented on said user display;
• data selecting a cryptographic value from a table of cryptographic values for inclusion as a dynamic portion of said PAN when a next, new financial transaction is electronically sensed with any merchant terminal;
• not repeating the use of any cryptographic data value from said table of cryptographic values in another financial transaction with any merchant terminal after being used once;
• and
• authorizing with an electronic data message said next financial transaction only if said PAN electronically read by any merchant terminal includes a correct cryptographic value in said user account number field.

A secure financial transaction network for payment cards, comprising:

• a personal account number (PAN) with an included set of variations in a predictable sequence for linking with a particular payment card and user, wherein are included fields for a system number, a bank/product number, a user account number, and a check digit;
• static and dynamic magnetic recording devices for encoding a magnetic stripe on said payment card with said PAN and its variations in use-once sequence for periodic reading by a magnetic card reader during a financial transaction, wherein said PAN does not necessarily match another PAN that may be presented on a user display disposed on the same payment card;
• a secure message of personalization information to enable programming of a table of cryptographic values constituting sequenced predictable variations in said PAN on each user's payment card;
• a card-present trigger for sensing a next financial transaction being commenced with said payment card;
• a device for selecting a cryptographic value from said table of cryptographic values for inclusion as a dynamic portion of said user account number in said PAN when a next financial transaction is sensed;
• a device for not repeating the use of any cryptographic value from said table of cryptographic values in another financial transaction after its being used once;
• and
• a transaction authorized message for authorizing by said issuing bank said next financial transaction only if said PAN matches an expected variation defined originally in said secure message of personalization information for said table of cryptographic values.

A secure payment card, comprising:

• a payment card for use in card-present and card-not-present financial transactions with merchants;
• a set of personal account numbers (PAN's) that are predictable and sequentially issued visually or magnetically by the payment card, wherein are included data fields for a system number, a bank/product number, a user account number, and a check digit;
• a magnetic stripe disposed on the payment and providing static and dynamic magnetic data representing a selected one from the set of PAN's for periodic reading one-way access by a magnetic card reader during a card-present financial transaction;
• a precomputed and preprogrammed table of cryptographic values for constructing individual ones of the set of PAN's on the payment card when triggered by a use;
• a detector for sensing a next, new financial transaction being commenced with the payment card and providing a trigger to issue a new PAN;
• a cryptographic value selectable from the table of cryptographic values for inclusion as a dynamic portion of said user account number with said each PAN when a next financial transaction is sensed.