System-on-chip data security appliance and methods of operating the same

• US 10,389,817 B2
• Filed: 10/26/2018
• Issued: 08/20/2019
• Est. Priority Date: 04/09/2015
• Status: Active Grant

• Current Assignee: Web Sensing, LLC
• Original Assignee: Web Sensing, LLC
• Inventors: Dahlstrom, Jason, Taylor, Stephen
• Primary Examiner(s): Huson, Zachary K
• Application Number:
  US16/172,237
• Publication Number:
  US 20190068720A1
• Time in Patent Office: 298 Days
• CPC Class Codes: G06F 9/4401 Bootstrapping security arrangements therefor G06F21/57
• CPC Class Codes: G06F 9/4406 Loading of operating system
• CPC Class Codes: H04L 63/0414 during transmission, i.e. party's identity is protected against eavesdropping, e.g. by using temporary identifiers, but is known to the other party or parties involved in the communication
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network

Abstract

System-on-chip data security appliance (“SoC-DSA”) and methods of operating the same. In one embodiment, the SoC-DSA includes data security mechanisms enclosed within a protected boundary of a single chip. In some embodiments, isolation and access control features are hidden within an on-chip field-programmable gate array (“FPGA”). The isolation and access control features can be implemented such that they are not visible to or alterable by software executing on the processing cores of the SoC-DSA, which provides for continued data security even in the presence of software exploitation, such as a malicious implant, that otherwise compromises data security in software-only systems. The SoC-DSA can be used to enhance data security in existing data security devices and protocols, such as high assurance guards (“HAG”) and can be used to create new types of security devices, such as devices enforce alternative human data interactions (“HDI”) models.

Claims

1. A system-on-chip data security appliance diode (SoC-DSA Diode) comprising:

a single-chip device defining a protected boundary co-incident with a boundary of the single-chip device;

a first communication interface;

a second communication interface;

an electronic processor located within the protected boundary;

a data transfer control component located within the protection boundary; and

memory located within the protected boundary, the memory storing data,

wherein the electronic processor is configured to

selectively allow a subset of designated one-way transfers of data appearing on the first communication interface to the second communication interface using the data transfer control component, based on data stored in the memory,

selectively allow designated fixed format data appearing on the second communication interface to be transferred to the first communication interface using the data transfer control component, based on data stored in the memory, and

discard all other data appearing on the first communication interface or the second communication.

2. The SoC DSA Diode of claim 1, wherein the electronic processor runs a full-featured operating system.

3. The SoC DSA Diode of claim 2, wherein data is monitored using hidden hardware monitors within the protection boundary.

4. The SoC-DSA Diode of claim 1, further comprising a third communication interface used to offload data from inside the protected boundary to a server.

5. The SoC-DSA Diode of claim 4, wherein the data offloaded to a server is encrypted using a cryptographic component located within the protected boundary.

6. The SoC-DSA Diode of claim 4, further comprising a memory interface to an external memory located outside the protected boundary, wherein the electronic processor is configured to encrypt data stored to the external memory using a cryptographic component within the protected boundary prior to transferring the data to the external memory through the memory interface.

7. The SoC-DSA Diode of claim 1, further comprising a cryptographic component located within the protected boundary.

8. The SoC-DSA Diode of claim 1, further comprising a power supply including at least one selected from the group consisting of a battery power supply and an electrical power supply.

9. The SoC-DSA Diode of claim 1, further comprising a third communication interface connecting with an anti-tamper sensor performing hardware monitoring for physical tampering.

10. The SoC-DSA Diode of claim 1, further comprising a third communication interface receiving user input for verifying a physical presence of an authenticated operator.

11. The SoC-DSA Diode of claim 1, further comprising a third communication interface communicating with a remote server for storing and retrieving public keys.

12. The SoC-DSA Diode of claim 1, further comprising a secure boot loader located within the protected boundary, the secure boot loader providing secure software bootstrapping.

13. The SoC-DSA Diode of claim 1, wherein the SoC-DSA Diode dynamically obtains configuration data including at least one selected from a group consisting of software, firmware, a field programmable gate array configuration, a key, a hash value, a policy rule, and a human-data interaction rule over a data interface.

14. The SoC-DCA Diode of claim 13, wherein the configuration data is received in encrypted form and is decrypted within the protected boundary using a cryptographic component located within the protected boundary.

15. The SoC-DSA Diode of claim 1, wherein the electronic processor is further configured to perform a reversible message operation, including performing at least one selected from a group consisting of message padding and unpadding, message fragmentation and assembly, message compression and decompression, on data appearing on at least one selected from the group consisting of the first communication interface and the second communication interface prior to re-transmission of the data from within the protected boundary.

16. The SoC-DSA Diode of claim 1, wherein at least one selected from a group consisting of the first communication interface and the second communication interface includes at least one selected from the group consisting of a 802.11 communication interface, a 802.15 communication interface, a cellular communication interface, a wired Ethernet communication interface, and a Bluetooth communication interface, and at least one selected from the group consisting of the first communication interface and the second communication interface communicates with an appliance via an intervening network infrastructure, wherein the appliance includes at least one selected from the group consisting of a second SoC-DSA Diode and an unbundling application.

17. The SoC-DSA Diode of claim 1, wherein a field device attached to at least one selected from the group consisting of the first communication interface and the second communication interface includes at least one selected from the group consisting of an ultrasonic range sensor inserted into an orifice of a container, a potentiometer sensor attached to a mechanical level indicator, a ranging sensor determining a level of material within a container, a flow sensor, a pressure sensor, a vibration sensor, a temperature sensor, an optical sensor, a medical sensor for a medical device, a switch, a jumper, a valve, a hydraulic piston, a shutoff valve controlling a level within a container, a medical actuator, a sound generator, a light, and a display.

18. The SoC-DSA Diode of claim 1, wherein the first communication interface includes a plurality of communication interfaces and wherein the SoC-DSA Diode selects one of the plurality of communication interfaces to use based on a property of a communication channel used by each of the plurality of communication interfaces, the property including at least one selected from the group consisting of availability, signal strength, signal-to-noise ratio, interference, a temporal profile, and a historical profile.

19. The SoC-DSA Diode of claim 18, wherein the SoC-DSA Diode selects the one of the plurality of communication interfaces manually, automatically, or non-deterministically.

20. The SoC-DSA Diode of claim 1, wherein the SoC-DSA Diode refreshes data stored in the memory manually, automatically, or non-deterministically.

21. The SoC-DSA Diode of claim 1, wherein the SoC-DSA Diode refreshes data stored in the memory by placing data at random locations in the memory.

22. The SoC DSA Diode of claim 1, further comprising a copy of the first communication interface, the copy of the first communication providing an alternative data communication path from within the protected boundary or an alternative attachment point for a field device from within the protected boundary.

23. The SoC-DSA Diode of claim 1, wherein the electronic processor is configured to perform hardware monitoring for malicious attacks within the protected boundary.

24. The SoC-DSA Diode of claim 1, wherein the SoC-DSA Diode ignores communications received from a second unauthentic SoC DSA over the first communication interface or the second communication interface.

25. The SoC-DSA Diode of claim 1, wherein the electronic processor constrains communications over the first communication interface and the second communication interface to a fixed format or a fixed length.

26. A system comprising:

a plurality of system-on-chip data security appliance diodes (SoC-DSA Diodes), each of the plurality of SoC-DSA Diodes including a single-chip device defining a protected boundary co-incident with a boundary of a chip included in the single-chip device and a communication interface; and

an intermediate network infrastructure connecting the plurality of SoC-DSA Diodes through the communication interface of each of the plurality of SoC-DSA Diodes.

27. The system of claim 26, further comprising an unbundling application, wherein the unbundling application communicates with at least one of the plurality of SoC-DSA Diodes through the intermediary network infrastructure.

28. The system of claim 26, wherein at least one of the plurality of SoC-DSA Diodes is designated as a zone for message operations associated with a subset of the plurality of SoC-DSA Diodes.