Off line cash card system and method
First Claim
1. An electronic fund transfer system for handling a card bearer'"'"'s fund transfer transaction in a trade sale comprising:
- a cash card having machine sensitive information recorded thereon, including information representing an available cash balance in an account of the bearer, and a randomly mutated first enciphering key; and
a transaction register machine at the location of trade sale including means for receiving said cash card from said bearer and recording information to and reading information from said cash card,randomly generating said first enciphering key and recording said first enciphering key on said cash card with a random mutation by recording with no a.c. or d.c. bias and no saturation,receiving personal identification number (PIN) data from said bearer independent of said cash card, said PIN data constituting a second enciphering key,enciphering and deciphering data to be recorded on and read from said cash card using said first and second enciphering keys,verifying the validity of said cash card is an authorized card bearer by determining whether said received PIN data successfully deciphers information previously enciphered and recorded onto the card,modifying said available cash balance and other information recorded on said cash card in accordance with said transaction, andmagnetically recording and storing information of the trade sale cash transaction for later processing.
1 Assignment
0 Petitions
Accused Products
Abstract
A "bank" cash card system for handling fund transfer transactions between a payor and a payee having a magnetic "hysteresis" security arrangement. A cash card has a magnetic stripe on which the available cash balance, the identification and security information are scramble recorded. A transaction register machine reads data from the card, carries out the transaction and records the new account balance on the card. The modified information is "restored" on the card is in the form of a rescrambled code. The transaction register machine also includes a magnetic tape of the cassette type or disk for storing each transaction thereon for further processing of the information at a remote data processing center. The transaction register machine further includes a main keyboard on the side of the payee for displaying the cash balance, entering the total amount of the sale and recording the new cash balance on the card. The main keyboard is responsive to the card holder'"'"'s or customer'"'"'s keyboard which has a slot for insertion of the card for verification by entering the correct identification number known only to the card holder. A random surface pattern on a given portion of the card is preferably scanned to produce a digital number uniquely identifying the card.
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Citations
29 Claims
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1. An electronic fund transfer system for handling a card bearer'"'"'s fund transfer transaction in a trade sale comprising:
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a cash card having machine sensitive information recorded thereon, including information representing an available cash balance in an account of the bearer, and a randomly mutated first enciphering key; and a transaction register machine at the location of trade sale including means for receiving said cash card from said bearer and recording information to and reading information from said cash card, randomly generating said first enciphering key and recording said first enciphering key on said cash card with a random mutation by recording with no a.c. or d.c. bias and no saturation, receiving personal identification number (PIN) data from said bearer independent of said cash card, said PIN data constituting a second enciphering key, enciphering and deciphering data to be recorded on and read from said cash card using said first and second enciphering keys, verifying the validity of said cash card is an authorized card bearer by determining whether said received PIN data successfully deciphers information previously enciphered and recorded onto the card, modifying said available cash balance and other information recorded on said cash card in accordance with said transaction, and magnetically recording and storing information of the trade sale cash transaction for later processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16)
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14. An electronic fund transfer system for carrying out cash transfer transactions in business and trade sale dealings comprising:
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a plastic card having a magnetic stripe containing information representing an available cash balance and other information including a first enciphering key recorded with no a.c. or d.c. bias and no saturation; a transaction cash register machine for register recording an amount of money received and exhibiting an amount of each sale, said transaction cash register machine including means for reading said magnetic stripe, means for verifying the validity of said card, means for verifying that a user of said card is an authorized card bearer, means for modifying said cash balance and other information recorded on said magnetic stripe, and means for magnetically recording and storing information of each transaction for further processing at a data processing center. - View Dependent Claims (17, 18, 19)
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20. An electronic fund transfer system for transferring funds from a bearer'"'"'s to a transferee'"'"'s account comprising:
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a card having enciphered information recorded thereon including at least an available cash balance and a first enciphering key recorded with no a.c. or d.c. bias and no saturation to carry out a money transfer transaction independent of any other source of information, and a cash card terminal machine including means for reading, recording, and displaying said information on said card. - View Dependent Claims (21, 22, 23, 24)
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25. A method of uniquely identifying a card by enciphering information thereon comprising the steps of:
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randomly generating a digital number, converting said digital number to an analog signal, and recording said analog signal onto said card with a random mutation by recording with no a.c. or d.c. bias and no saturation.
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26. A method of verifying the validity any one of a plurality of presented cards each having information enciphered thereon in an analog signal comprising the steps of:
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reading said analog signal from said card, and determining whether said analog signal contains any a.c. or d.c. bias.
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27. A method of verifying that a user of an electronic fund transfer system card is an authorized card bearer, comprising the steps of:
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(a) upon a first presentation of said card to the system, randomly generating a digital number; converting said digital number to an analog signal; recording said analog signal onto said card with a random mutation by recording with no a.c. or d.c. bias and no saturation; reading said randomly mutated analog signal from said card; converting said randomly mutated analog signal to a digital representation thereof; and using said digital representation as a first enciphering key along with personal identification number (PIN) data supplied by said user as a second enciphering key to encipher onto said card an identifying datum which is uniformly used throughout said system, and (b) and upon a subsequent presentation of said card to the system, reading said enciphered identifying datum from said card; reading said randomly mutated analog signal from said card; converting said randomly mutated analog signal to a digital representation thereof; and using said digital representation as a first enciphering key along with PIN data supplied by said user as a second enciphering key to attempt to decipher said identifying datum, whereby a successful deciphering of said identifying datum indicates that said user is an authorized card bearer.
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28. A method of enciphering and recording onto a card information used in an electronic fund transfer system, including an available cash balance, comprising the steps of:
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randomly generating a digital number; converting said digital number to an analog signal; recording said analog signal onto said card with a random mutation by recording with no a.c. or d.c. bias and no saturation; reading said randomly mutated analog signal from said card; converting said randomly mutated analog signal to a digital representation thereof; using said digital representation as a first enciphering key along with personal identification number (PIN) data supplied by a bearer of said card as a second enciphering key to encipher said electronic fund transfer system information; and recording said enciphered information onto said card. - View Dependent Claims (29)
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Specification