Security transaction system for financial data

• US 4,825,050 A
• Filed: 09/13/1983
• Issued: 04/25/1989
• Est. Priority Date: 09/13/1983
• Status: Expired due to Fees

• Current Assignee: Transaction Security Corporation Plantation FLA A Corporation
• Original Assignee: Transaction Security Incorporated
• Inventors: Griffith, John B., Linton, Donald F.
• Primary Examiner(s): TRAFTON, DAVID
• Application Number:
  US06/531,673
• Time in Patent Office: 2,051 Days
• Field of Search: 235/379, 235/380, 178/22.08, 178/22.1, 178/22.11, 380/29, 380/45, 902/2
• US Class Current: 235/379
• CPC Class Codes: G07F 7/1016 Devices or methods for securing the PIN and other transaction-data, e.g. by encryption arrangements for secret communication, see H04L9/00

Abstract

A system for a data protection executing financial transactions employing cryptographic techniques. The system comprises an encoded card, which has been initially encrypted using the National Bureau of Standards Data Encryption Standard Algorithm. A subsequent encryption utilizes a private key of a public key cryptosystem is completed resulting in an account number and an uncoded identifier which are placed on the card. The encoded card may be placed in a sender unit which decrypts the public key. The user that enters a personal identifier in the sender unit. The data is transferred to a receiving unit that decrypts the transmitted data utilizing the private key which is unknown to both the user and the sender unit.

Claims

1. Apparatus for encoding a signal on an individual machine readable media when issued by an entity to a user for uniquely securing said media for use in performing transactions with said entity comprising:

entity public key cryptosystem key generating means (109) to produce a private key signal (110) and public key signal (206) pair;

user individual information input means (101) and checksum generating means (102) for providing specific user identity data and checksum verification data (105);

encoder means for encoding including a first encoding means (111) and a second encoding means (104), said first encoding means (111) is a public key cryptosystem and said second encoding means (104) is a private key cryptosystem;

said first encoding means (111) connected to said user individual input means (101) and checksum verification generating means (102) and said entity private key signal (110) for producing a first encoding signal (107);

said second encoding means (104) connected to said first encoding means (111) and checksum verification generating means (108) and user identification input means (100 and reduction means

     103), for producing a media encoding signal (117);

said first encoding means (111) and said second encoding means (104) connected together to produce a signal at least twice encoded for use as said media encoding signal (117);

transducer means (114) connected to said second encoding means 104, said transducer means operable with the machine readable media (115) for recording a detectable signal thereon representative of at least said media encoding signal (117).

2. The apparatus according to claim 1, wherein said first encoding means and its corresponding input signals is a private key cryptosystem and said second encoding means and its corresponding input signals is a public key cryptosystem.

3. Apparatus for decoding a signal on an individual machine readable media when issued by a entity and used by a user for uniquely verifying said media for use in performing transactions with said entity comprising:

a media reader means (202) for reading said media encoding signal (200),

decoder means for decoding including a first decoding means (212) and a second decoding means (205), said first decoding means (212) is a private key cryptosystem and said second decoding means (205) is a public key cryptosystem,

said first decoding means (212) connected to said media reader input means (202) and checksum verification generating means (209) and user identification input means (210 and reduction generating means

     211) for producing a first decoding signal (203),

said second decoding means (205) connected to said first decoding means (212) and checksum verification generating means (214) and said entity public key signal (206) for producing individual information input (216),

said first decoding means (212) and said second decoding means (205) connected together to produce a signal at least twice decoded for producing individual information input (216).

4. The apparatus according to claim 3 wherein the first decoding means and its corresponding input signals is a public key cryptosystem and said second decoding means and its corresponding input signals is a private key cryptosystem.