# US 2016/0366179 A1 · Authenticated Sensor Interface Device

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- Number: US 2016/0366179 A1
- Document ID: US20160366179A1
- Status: Published application
- Kind: A1
- Application number: 15/249,762
- Filed: 2016-08-29
- Published: 2016-12-15
- Earliest claimed: 2011-11-03
- Assignees: Savannah River Nuclear Solutions, LLC
- Applicants: Savannah River Nuclear Solutions, LLC
- Inventors: Jody Rustyn Coleman; Richard W. Poland
- Web page: https://patentgrep.com/patent/US20160366179A1

## CPC

- H04L 63/18: {using different networks or channels, e.g. using out of band channels (cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215)}
- G06F 12/1408: {by using cryptography (for digital transmission H04L9/00)}
- H04B 10/00: Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04L 9/0827: {involving distinctive intermediate devices or communication paths (network architectures or network communication protocols using different networks H04L63/18)}
- H04L 63/0492: {by using a location-limited connection, e.g. near-field communication or limited proximity of entities}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04B: TRANSMISSION

## Abstract

A system and method for the secure storage and transmission of data is provided. A data aggregate device can be configured to receive secure data from a data source, such as a sensor, and encrypt the secure data using a suitable encryption technique, such as a shared private key technique, a public key encryption technique, a Diffie-Hellman key exchange technique, or other suitable encryption technique. The encrypted secure data can be provided from the data aggregate device to different remote devices over a plurality of segregated or isolated data paths. Each of the isolated data paths can include an optoisolator that is configured to provide one-way transmission of the encrypted secure data from the data aggregate device over the isolated data path. External data can be received through a secure data filter which, by validating the external data, allows for key exchange and other various adjustments from an external source.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A secure data filter for receiving external data from a remote data source, the secure data filter comprising:
a receiver comprising one or more optical sensors configured to receive an optical signal encoding the external data;
a sensor circuit coupled to each of the one or more sensors of the receiver, each sensor circuit configured to change state over a time period in response to an optical signal received at its associated optical sensor;
a movable shutter capable of preventing optical access to the one or more optical sensors; and
a controller configured to actuate the movable shutter to provide optical access to the one or more optical sensors, the controller configured to control optical access provided by the movable shutter based at least in part on the time period for each sensor circuit to change state.

### Claim 14 (depends on 13)

The secure data filter of claim 13, wherein the receiver comprises eight optical sensors, each optical sensor configured to receive a single bit of external data via an optical signal.

### Claim 15 (depends on 13)

The secure data filter of claim 13, wherein the controller is configured to control optical access provided by the movable shutter based at least in part on the time period for each sensor circuit to change state by:
actuating the movable shutter to provide optical access to the one or more optical sensors during the time period for each sensor circuit to change state; and
after expiration of the time period but prior to expiration of twice the time period, actuating the movable shutter to prevent optical access to the one or more optical sensors.

### Claim 16 (depends on 13)

The secure data filter of claim 13, wherein the receiver comprises an additional optical sensor configured to optically receive a checksum for the external data.

### Claim 17 (depends on 13)

The secure data filter of claim 13, wherein the controller is configured to periodically actuate the movable shutter to provide optical access to the one or more optical sensors based at least in part on a timing schedule.

### Claim 18 (depends on 13)

The secure data filter of claim 13, wherein the sensor circuit comprises at least one of a resistor-capacitor circuit (RC circuit) or a Schmitt trigger.

### Claim at position 8

19-20. (canceled)