# US 12,111,917 B2 · Terminals and methods for secure transactions

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- Number: US 12,111,917 B2
- Document ID: US12111917B2
- Status: Granted
- Kind: B2
- Application number: 16/765,111
- Filed: 2018-11-15
- Published: 2020-11-05
- Granted: 2024-10-08
- Earliest claimed: 2018-11-15
- Assignees: Enrico Maim
- Applicants: Enrico Maim
- Inventors: Enrico Maim
- Web page: https://patentgrep.com/patent/US12111917B2

## CPC

- G06F 21/55: Detecting local intrusion or implementing counter-measures
- G06F 21/57: Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
- G06F 21/606: {by securing the transmission between two devices or processes}
- G06F 21/71: to assure secure computing or processing of information
- G06F 21/87: by means of encapsulation, e.g. for integrated circuits
- H04L 63/14: {for detecting or protecting against malicious traffic}
- H04L 63/20: {for managing network security; network security policies in general (filtering policies H04L63/0227)}
- H04W 12/041: Key generation or derivation
- H04W 12/50: Secure pairing of devices
- H04W 12/63: Location-dependent; Proximity-dependent
- G06F 2221/034: Test or assess a computer or a system
- H04L 63/0435: {wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption (cryptographic mechanisms or cryptographic arrangements for symmetric key encryption H04L9/06)}
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A portable terminal includes a security envelope, the envelope being able to capture a signal transmitted by a generator of the terminal (screen, loudspeaker, etc.), to convey this signal and to restore it at the level of a sensor of the terminal (camera, microphone), so as to be able to detect a breach of this envelope by alteration of the restored signal.

## Claims

### Claim 1

A portable terminal comprising:
a display screen and a camera, all housed in a rigid envelope forming part of the terminal, the rigid envelope comprising:
a first optical coupling with a region of the display screen,
a second optical coupling with a region of the camera, and
at least one optical channel extending along the rigid envelope between said first coupling and said second coupling,
the rigid envelope including a first internal reflective surface and a second internal reflective surface;
wherein the rigid envelope captures a signal transmitted by said display screen and reflects said signal via said first internal reflective surface onto said at least one optical channel, and reflects said signal via said second internal reflective surface to convey said signal and restore said signal at said camera,
the terminal further comprising an envelope breach detector for detecting a breach of said rigid envelope in response to an alteration of the restored signal relative to the transmitted signal, whereby the rigid envelope plays the role of a secure anti-fraud envelope.

### Claim 2 (depends on 1)

The terminal of claim 1, wherein the rigid envelope incorporates a plurality of channels capable of conveying the signal, said plurality of channels being distributed in the rigid envelope.

### Claim 3 (depends on 1, 2)

The terminal of claim 1 or 2, wherein the envelope breach detector is able to process the restored signal and generate an envelope signature.