Homomorphic Encryption for Offline Interaction Payload Security

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Solution Overview

Problem

Conventional technologies lack a secure and efficient solution for users to complete interaction sessions with entities when their communication equipment is not connected to a network, as they cannot securely transmit interaction payloads through intermediate equipment.

Innovation Solution

The system employs intermediate equipment and homomorphic encryption to securely transmit and validate interaction payloads by encrypting the payloads and user inputs, allowing them to be sent through a short-range wireless connection to an entity server without decryption, ensuring secure communication and validation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the user's communication equipment is not connected to a network, then the user cannot directly communicate with the entity, but using intermediate equipment to transmit the interaction payload creates security vulnerabilities

Engineering Contradiction:

Improveability to communicate without network connectionVSAvoidsecurity of interaction payload transmission

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces intermediate equipment as a mediator between the user's communication equipment and the entity server. This intermediary enables communication when the user's device is not directly connected to the network, while the homomorphic encryption ensures that the intermediate equipment cannot access or compromise the interaction payload, thus resolving the security vulnerability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The interaction payload is encrypted using homomorphic encryption before being transmitted through the intermediate equipment. This preliminary encryption action ensures that the payload remains secure throughout the transmission process, even though it passes through multiple intermediaries, thus maintaining reliability while enabling adaptability.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the interaction payload is encrypted using homomorphic encryption, then security is improved, but the complexity of the system increases

Engineering Contradiction:

Improvesecurity of interaction payloadVSAvoidencryption and validation process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the decryption function from the intermediate equipment and the entity server, leaving only encryption and encrypted computation. By taking out the vulnerable decryption step, the system achieves high security with homomorphic encryption while the complexity is managed by removing the need for secure key management and decryption infrastructure at these points.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If the entity server validates the interaction payload through the intermediate equipment, then communication is enabled, but the intermediate equipment may access unauthorized information

Engineering Contradiction:

Improvevalidation processVSAvoidunauthorized access to interaction payload

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The intermediate equipment serves as a mediator that forwards encrypted data without accessing its contents. The homomorphic encryption ensures that the intermediate equipment cannot extract or access the interaction payload or validation messages, thus enabling ease of operation while preventing unauthorized access to sensitive information.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The homomorphic encryption creates an inert environment where the interaction payload and validation messages remain in encrypted form throughout the entire process. This inert encrypted state prevents the intermediate equipment from accessing or compromising the information, while still allowing the entity server to perform validation operations on the encrypted data.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

Data Source

PatentUS20240356723A1System and method for implementing an interaction session with an entity using intermediate devices and homomorphic encryption

Publication Date: 2024.10.24 BANK OF AMERICA CORP

AI summary

A system for implementing an interaction session with an entity using intermediate equipment and homomorphic encryption comprises a first communication equipment and a second communication equipment in communication with an entity server via a network. The first communication equipment is communicatively coupled to the second communication equipment via a short-range wireless connection. The first communication equipment communicates an encrypted interaction payload to the second communication equipment which forwards the encrypted interaction payload to an entity server. The entity server sends an encrypted validation message including a security code to the first communication equipment through the second communication equipment to validate an interaction payload object. The first communication equipment receives a user input and communicates an encrypted user input to the second communication equipment which forwards the encrypted user input to the entity server. The entity server determines that the user input comprises the security code and reconciles the payload object.