USB key apparatus for interacting with a USB host via a USB port

• US 6,763,399 B2
• Filed: 04/22/2002
• Issued: 07/13/2004
• Est. Priority Date: 11/10/1998
• Status: Expired due to Term

• Current Assignee: SafeNet Data Security (Israel) Ltd.
• Original Assignee: Aladdin Knowledge Systems Limited (Thales SA)
• Inventors: Margalit, Yanki, Margalit, Dany, Kastershtien, Rami
• Primary Examiner(s): Gaffin, Jeffrey
• Assistant Examiner(s): PEYTON, TAMMARA R
• Application Number:
  US10/126,520
• Publication Number:
  US 20040073726A1
• Time in Patent Office: 813 Days
• Field of Search: 710/8, 710/13, 710/63, 710/103, 713/200, 713/202, 713/185
• US Class Current: 710/13
• CPC Class Codes: G06F 21/34 involving the use of external additional devices, e.g. dongles or smart cards
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06K 19/07733 the record carrier containing at least one further contact interface not conform ISO-7816

Abstract

A smart card—host system that operates without the intermediation of a smart card reader. The smart card—host system comprises a host, which has a USB interface, and a portable device, which provides smart card function(s). The portable device has a smart card chip for performing the smart card function(s); a USB interface for connecting the portable device with the host via USB protocol; and a microprocessor for controlling the transfer of data between the USB interface and the smart card chip, for converting data from a USB format to the format of the smart card chip and for converting data from the format of the smart card chip to a USB format.

Claims

1. A smart card—

host system, wherein a portable device communicates directly with a USB interface of a host, said smart card—

host system comprising;

a host, having thereon a USB interface;

a portable device, for providing smart card function(s), said portable device having thereon a smart cart chip, for performing said smart card function(s), a USB interface, for connecting said portable device with said host via USB protocol; and

a microprocessor, for enabling at least one function selected from the group consisting of controlling the transfer of data between said USB interface and said smart card chip, for converting data from a USB format to the format of said smart card chip and for converting data from the format of said smart card chip to a USB format.

2. A system according to claim 1, wherein said portable device consists of at least one substrate having thereon said smart chip, said USB interface, and said microprocessor.

3. A system according to claim 1, wherein said portable device is a USB key operative as a component into which said smart card chip, said USB interface, and said microprocessor are placed.

4. A system according to claim 1, wherein said portable device further comprises data storage means for at least one function selected from the group consisting of storing data required for the operation of said microprocessor and storing data required for the operation of said smart card chip.

5. A system according to claim 1, wherein said portable device further comprises secured memory.

6. A system according to claim 1, wherein said system is operative to perform at least one function selected from the group consisting of cryptography, authentication, encryption, public key infrastructure, digital signature, RSA and access control.

7. A system according to claim 1, wherein said supports ISO7816 standard.

22. A system according to claim 1, wherein said smart chip is operationally connected directly to said microprocessor.

23. A system according to claim 22, wherein said smart chip is operationally connected directly to said microprocessor on a common substrate.

8. A portable smart card apparatus for providing smart card function(s) to a host system, by communicating directly with a USB interface of the host system, said smart card apparatus comprising:

a smart card chip, for performing said smart card function(s);

a USB interface, for connecting the portable device apparatus with the host system, via USB protocol; and

a microprocessor, for enabling at least one function selected from the group consisting of controlling the transfer of data between said USB interface and said smart card chip, converting data from a USB format to the format of said a smart card chip and converting data from the format of said smart card chip to a USB format.

9. An apparatus according to claim 8, wherein said portable device consists of at least one substrate having thereon said smart chip, said USB interface, and said microprocessor.

10. An apparatus according to claim 8, wherein said portable device is a USB key operative as a component into which said smart card chip, said USB interface, and said microprocessor are placed.

11. An apparatus according to claim 8, wherein said portable device further comprises data storage means, for storing data required for the operation of at least one element selected from the group consisting of said microprocessor and said smart card chip.

12. An apparatus according to claim 8, wherein said portable device further comprises secured memory.

13. An apparatus according to claim 8, wherein said apparatus is operative to perform at least one function selected from the group consisting of cryptography, authentication, encryption, public key infrastructure, digital signature, RSA and access control.

14. An apparatus according to claim 8,wherein said apparatus supports ISO7816 standard.

24. An apparatus according to claim 8, wherein said smart chip is operationally connected directly to said microprocessor.

25. A system according to claim 24, wherein said smart chip is operationally connected directly to said microprocessor on a common substrate.

15. A method for interacting directly between a smart card chip and a host via a USB interface of the host, comprising the steps of:

coupling the host with a USB interface, for interacting with an external device via USB protocol;

providing a portable external device, for being used as a platform for said smart card chip, said portable device having thereon a USB interface, for interacting with the host via USB protocol; and

a microprocessor, for executing at least one function selected from the group consisting of controlling the transfer of data between said USB interface and said smart card chip, converting data from a USB format to the format of said smart card chip and converting data from the format of said smart card chip to a USB format;

upon receiving data in the USB interface of said portable device, converting said data from a USB format of said smart card by said microprocessor, and conveying the converted data to said smart card chip; and

upon sending data from said smart card chip to the host, converting said data from the format of said smart card chip to said USB format by said microprocessor, conveying the converted data to said USB interface of said portable device, and there from to the host, via the host'"'"'s USB interface.

16. A method according to claim 15, wherein said portable device consists of at least one substrate having thereon said smart chip, said USB interface, and said microprocessor.

17. A method according to claim 15, wherein said portable device is a USB key operative as a component into which said smart card chip, said USB interface, and said microprocessor are placed.

18. A method according to claim 15, wherein said portable device further comprises data storage means, for storing data required for operating at least one component selected from the group consisting of microprocessors and smart card chips.

19. A method according to claim 15, wherein said portable device further comprises secured memory.

20. A method according to claim 15, wherein said method is operative to perform at least one function selected from the group consisting of cryptography, authentication, encryption, public key infrastructure, digital signature, RSA and access control.

21. A method according to claim 15, wherein said portable device supports ISO7816 standard.

26. A method according to claim 15, wherein said smart chip is operationally connected directly to said microprocessor.

27. A system according to claim 26, wherein said smart chip is operationally connected directly to said microprocessor on a common substrate.