Check authorization system and method
View Patent ↗A self-authenticating check authorization system and method includes a check that has standard bank and account information printed on the MICR line, as well as a one-way hash value that is computed based on the standard bank and account information as well as a personal identification code of a customer and a key. The scanned MICR line data is provided to a check verifier, which also receives the personal identification code from the customer. The check verifier performs a hashing algorithm on the received data, and compares the computed hash value to a hash value obtained from the scanned MICR line data. If there is a match, the check is verified; if not, the check is not verified.
1. A method comprising:
receiving, using a computing device of a check verifier, scanned check MICR line data, which includes a first one-way hash value, and non-check customer data from a point-of-sale location and a key from a source other than the point-of-sale location;
computing, using the computing device of the check verifier, a second one-way hash value based on the scanned check MICR line data, the customer data, and the key; and
verifying, using the computing device of the check verifier, that the first hash value is equivalent to the second hash value.
2. The method according to claim 1 , wherein the first one-way hash value is generated in an n-digit field at one end of the MICR line.
3. A system, comprising:
a receiver, wherein the receiver is programmed to receive information representative of a MICR line that includes data representative of an ABA number of a bank and a customer account number; and
a check printer, wherein the check printer is programmed to print the information on a check MICR line and to print a p-bit hash value on the check MICR line based on the information, an n digit personal code, and a key.
4. The system according to claim 3 , wherein the check printer is programmed to print a check number on the check MICR line.
5. A tangible computer-readable medium having computer executable instructions stored thereon, the computer executable instructions comprising:
instructions to create a payor field on a face of a check;
instructions to create a payee field on the face of the check;
instructions to create a check amount field on the face of the check; and
instructions to create a MICR line on the face of the check, said MICR line including:
an n-digit ABA number;
an m-digit customer account number;
a p-digit check number; and
an r-digit one-way hash value, and
wherein the r-digit one-way hash value is computed using the ABA number, the customer account number, the check number, a c-digit personal identification code that is not included on the MICR line, and a key that is not included on the MICR line.
6. The tangible computer-readable medium according to claim 5 , wherein the computer executable instructions further comprise instructions to print the r-digit one-way hash value at one end of the MICR line on the face of the check.
7. The tangible computer-readable medium according to claim 5 , wherein:
said MICR line further includes a t-digit product code value that provides information regarding an account from which the check is to be drawn against, and
the r-digit one-way hash value is computed based in part on the t-digit product code.
8. A system comprising:
means for receiving information that includes an ABA number of a bank, a customer account number, an n-digit personal code, and a key;
means for generating a p-bit hash value based on the information; and
means for printing the ABA number, the customer account number, and the p-bit hash value on a MICR line of a check.
9. A system, comprising:
a receiver receiving information comprising an ABA number of a bank, a customer account number, an n-digit personal code, and a key;
a p-bit hash value processor generating a p-bit hash value based on the information; and
a check printer coupled to the processor and printing the ABA number, the customer account number, and the p-bit hash value on a MICR line of a check.