US 2026/0100827 A1Published application

Systems and methods for establishing cryptographic keys shared among three or more devices

AssigneeWells Fargo Bank, N.A.

InventorsJeff J. Stapleton, Richard Toohey, Peter Bordow

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Abstract

Systems, apparatuses, methods, and computer program products are disclosed for establishing cryptographic keys shared among three or more devices. An example method includes generating a set of particles and an entangled particle triplet based on the set of particles. The example method further includes transmitting the first set of entangled particles to a first host device, the second set of entangled particles to a second host device, and the third set of entangled particles to a third host device, and making a determination whether the three sets of bits are matching, where the three sets of bits are derived from the three sets of entangled particles sent to the three host devices. The example method further includes establishing the cryptographic keys based on the matching sets of bits.

Claims20

Dependent claims

A method for secure communication among two or more devices, the method comprising:

receiving, by communications hardware, a first entangled particle from a first host device, wherein the first entangled particle belongs to a set of entangled particles comprising the first entangled particle, a second entangled particle, and a third entangled particle;
making a measurement, by cryptographic circuitry, of the first entangled particle;
determining, by the cryptographic circuitry, a first set of bits based on the measurement of the first entangled particle;
transmitting, by the communications hardware, an indication of the first set of bits to the first host device;
receiving, by the communications hardware and from the first host device, an indication that the first set of bits a second set of bits, and a third set of bits are a matching set of bits, wherein the first set of bits is derived from the first entangled particle, the second set of bits is derived from the second entangled particle, and the third set of bits is derived from the third entangled particle;
and
establishing, by the cryptographic circuitry, a secure communications channel with a second host device based on the matching set of bits.

4 more elements

An apparatus for secure communication among two or more devices, the apparatus comprising:

communications hardware configured to:
receive a first entangled particle from a first host device, wherein the first entangled particle belongs to a set of entangled particles comprising the first entangled particle, a second entangled particle, and a third entangled particle;
cryptographic circuitry configured to:
make a measurement of the first entangled particle, and
determine a first set of bits based on the measurement of the first entangled particle,
wherein the communications hardware is further configured to:
transmit an indication of the first set of bits to the first host device;
and
receive, from the first host device, an indication that the first set of bits a second set of bits, and a third set of bits are a matching set of bits, wherein the first set of bits is derived from the first entangled particle, the second set of bits is derived from the second entangled particle, and the third set of bits is derived from the third entangled particle,
wherein the cryptographic circuitry is further configured to establish a secure communications channel with a second host device based on the matching set of bits.

7 more elements

An apparatus for establishing a secure communications channel between two or more devices, the apparatus comprising:

means for receiving a first entangled particle from a first host device, wherein the first entangled particle belongs to a set of entangled particles comprising the first entangled particle, a second entangled particle, and a third entangled particle;
means for making a measurement of the first entangled particle;
means for determining a first set of bits based on the measurement of the first entangled particle;
means for transmitting an indication of the first set of bits to the first host device;
means for receiving, from the first host device, an indication that the first set of bits a second set of bits, and a third set of bits are a matching set of bits, wherein the first set of bits is derived from the first entangled particle, the second set of bits is derived from the second entangled particle, and the third set of bits is derived from the third entangled particle;
and
means for establishing a secure communications channel with a second host device based on the matching set of bits.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/406,474Filed 2 Dec 2025
Priority: 11 Sep 2023
Published: 9 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 9/0861
Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords: generation of secret information…
H04L 9/0852
Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for…:…
H04L 9/0855
Quantum cryptography: involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes
H04L
Digital communication

Family

Application18/464,850Continuation · filed 11 Sep 2023
Application19/406,474Continuation
US 12,512,975 B2Related patent
US 2025/0088355 A1Published application
US 2026/0100827 A1This patent

From the US filing history. Foreign family members aren’t listed.

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