Apparatus for transfer of secure information between a data carrying module and an electronic device

• US 6,237,095 B1
• Filed: 01/06/1998
• Issued: 05/22/2001
• Est. Priority Date: 09/29/1995
• Status: Expired due to Term

• Current Assignee: Maxim Integrated Products, Inc. (Analog Devices, Inc.)
• Original Assignee: Dallas Semiconductor Corporation (Analog Devices, Inc.)
• Inventors: Curry, Stephen M., Loomis, Donald W., Fox, Christopher W.
• Primary Examiner(s): Swann, Tod R.
• Assistant Examiner(s): Smithers, Matthew
• Application Number:
  US09/003,541
• Time in Patent Office: 1,232 Days
• Field of Search: 380/4, 380/25, 380/24, 380/21, 711/164, 705/64, 705/65, 705/75, 713/175, 713/178, 713/168, 713/172
• US Class Current: 713/178
• CPC Class Codes: G06Q 20/06 Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/3672 initialising or reloading thereof
• CPC Class Codes: G06Q 20/3823 combining multiple encryption tools for a transaction
• CPC Class Codes: G06Q 20/4093 Monitoring of device authentication
• CPC Class Codes: G06Q 20/40975 using encryption therefor
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
• 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
• CPC Class Codes: H04L 2209/34 Encoding or coding, e.g. Huffman coding or error correction
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 9/3249 using RSA or related signature schemes, e.g. Rabin scheme
• CPC Class Codes: H04L 9/3263 involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823

Abstract

The present invention relates to an electronic module used for secure transactions. More specifically, the electronic module is capable of passing encrypted information back and forth between a service provider'"'"'s equipment via a secure, encrypted technique so that money and other valuable data can be securely passed electronically. The module is capable of being programmed, keeping track of real time, recording transactions for later review, and creating encryption key pairs.

Claims

1. An apparatus for receiving and transmitting encrypted data, comprising:

an input/output interface for receiving a challenge number from an electronic device;

a microprocessor circuit connected to said input/output interface;

a coprocessor circuit, connected to said microprocessor circuit;

a timing circuit connected to the microprocessor, the timing circuit for generating a time stamp;

a first memory connected to said microprocessor circuit, said first memory for storing a first data object; and

a second memory connected to said microprocessor circuit, said second memory including instructions readable by said microprocessor circuit to thereby cause said microprocessor circuit to;

initiate generation of a certificate, said certificate including said challenge number and a second data object; and

adjust said first data object according to said second data object responsive to a verification signal from said electronic device;

store a transaction script, the transaction script including at least a representation of the time stamp generated by the timing circuit.

2. The apparatus of claim 1, wherein said apparatus is programmable.

3. The apparatus of claim 2, wherein said apparatus is programmable via object oriented software.

4. The apparatus of claim 1, wherein said apparatus is capable of producing random encryption key pairs.

5. The apparatus of claim 1, further comprising memory means for storing a predetermined program, said memory means being connected to said microprocessor.

6. The apparatus of claim 1, further comprising a transaction counter for counting a number of transactions that said apparatus performs, said transaction counter being connected to said microprocessor.

7. The apparatus of claim 1 wherein said first data object includes a base monetary amount and wherein said second data object includes a transaction monetary amount.

8. The apparatus of claim 6 wherein the second memory further comprises instructions readable by said microprocessor circuit to thereby cause said microprocessor circuit to store a verification for one of said transactions, said verification including a value of said transactions counter for said one of said transactions and an encrypted signature.