# US 2019/0379643 A1 · System, method, and recording medium for communication and message comparison with encrypted light signals

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- Number: US 2019/0379643 A1
- Document ID: US20190379643A1
- Status: Published application
- Kind: A1
- Application number: 16/548,006
- Filed: 2019-08-22
- Published: 2019-12-12
- Earliest claimed: 2015-10-28
- Assignees: International Business Machines Corporation
- Applicants: International Business Machines Corporation
- Inventors: Nicholas Stephen Kersting
- Web page: https://patentgrep.com/patent/US20190379643A1

## CPC

- H04L 63/0428: {wherein the data content is protected, e.g. by encrypting or encapsulating the payload}
- H04B 10/114: Indoor or close-range type systems
- H04L 9/06: the encryption apparatus using shift registers or memories for block-wise {or stream} coding, e.g. DES systems {or RC4; Hash functions; Pseudorandom sequence generators}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

A method, system, and recording medium for communication comparison including communicating from a first device to a second device by the second device reading frequencies and intensities of light projected, by the first device, on an object.

## Claims

### Claim 1

A method for communication comparison, the method comprising:
communicating from a first device to a second device by the second device reading frequencies and intensities of light projected, by the first device, on an object.

### Claim 2

A system for communication comparison, the system comprising:
a processor; and
a memory, the memory storing instructions to cause the processor to perform:
communicating from a first device to a second device by the second device reading frequencies and intensities of light projected, by the first device, on an object.

### Claim 3

A non-transitory computer-readable recording medium recording a communication comparison program, the program causing a computer to perform:
communicating from a first device to a second device by the second device reading frequencies and intensities of light projected, by the first device, on an object.