Spatiotemporal Key Encryption Using ECC for Secure Decryption

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Solution Overview

Problem

Existing encryption methods, such as symmetric and public-key cryptography, face risks of key discovery and decryption vulnerabilities when spatiotemporal identifiers are not exact, necessitating a method that minimizes these risks.

Innovation Solution

A method using elliptic curve cryptography (ECC) combined with spatiotemporal identifiers based on time, path, and location to generate symmetric keys for encryption and decryption, incorporating intended and actual spatiotemporal identifiers to ensure secure communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If symmetric key or public key is used for encryption, then data can be encrypted and decrypted, but the risk of key discovery increases during transport

Engineering Contradiction:

Improveencryption securityVSAvoidkey discovery risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the parameters used for key generation from static keys to dynamic spatiotemporal identifiers (latitude, longitude, altitude, time). These identifiers change based on location and time, making the encryption key different for each message and location, thereby eliminating the risk of key discovery during transport while maintaining encryption capability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary action by pre-establishing the spatiotemporal identifier parameters (latitude, longitude, altitude, time) that will be used for encryption. The sender and receiver agree on the methodology for generating keys from these identifiers in advance, so that when messages are exchanged, the keys are derived on-the-fly without being transmitted, thus preventing key discovery

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If encryption key is transmitted for decryption, then decryption is enabled, but the key may be intercepted by third parties

Engineering Contradiction:

Improvedecryption capabilityVSAvoidinterception risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the key material (spatiotemporal identifiers) from the communication channel itself. Instead of transmitting the key separately with the encrypted message, the system uses the communication metadata (location, time) as the key source. This separation means the key never exists as a transmittable object, eliminating interception risk while preserving decryption capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces spatiotemporal identifiers as an intermediary between the encrypted message and the decryption key. The identifiers serve as a mediator that both parties can independently derive the same key from, without needing to exchange the key itself. This intermediary mechanism enables decryption while preventing key interception

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If exact spatiotemporal identifier is required for decryption, then security is enhanced, but decryption fails with minor deviations

Engineering Contradiction:

Improveencryption securityVSAvoididentifier exactness

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies beforehand cushioning by incorporating error tolerance mechanisms into the spatiotemporal identifier matching process. The system anticipates potential deviations in location or time data and builds in buffers or tolerance ranges that allow decryption to succeed even when the actual identifiers slightly differ from the expected ones, thus maintaining both security and robustness

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12476791B2Method for time, path, and location based encryption and decryption

Publication Date: 2025.11.18 THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY DEPARTMENT OF HEALTH & HUMAN SERVICES

AI summary

A method of encrypted communications comprising: by the sender; generating a first symmetric key, calculating the first symmetric key based on the intended spatiotemporal identifiers; encrypting the decipherable message with the coordinates of the first symmetric key to produce an encrypted message Dm; generating a second symmetric key; encrypting the encrypted message Dm with the coordinates of the second symmetric key to produce an encrypted message Cm; receiving the public key from the receiver; calculating a point P1 and a point P2; transmitting the encrypted message Cm, point P1, and point P2; by the receiver; transmitting the public key to the sender; determining the actual spatiotemporal identifiers; receiving the encrypted message Cm, point P1, and point P2; calculating the second symmetric key, decrypting the encrypted message Cm asymmetrically to reproduce the encrypted message Dm; decrypting the encrypted message Dm symmetrically with the actual spatiotemporal identifiers.