Cryptographic Identity Verification Using Nonce Challenge Response
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Solution Overview
Problem
Existing identity verification methods face vulnerabilities such as password theft, biometric data compromise, and centralized credential database breaches, leading to increased security risks and fraud in digital transactions.
Innovation Solution
A cryptographically verifiable identity architecture using a Personal Cryptographic Matter (PCM) framework that manages authentication keys and passphrases securely, employing public-private key cryptography for decentralized identity verification without exposing sensitive information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional identity verification methods (passwords, biometrics, centralized databases) are used, then ease of operation is maintained, but security reliability deteriorates due to theft, compromise, and breaches
Solution Approach 1:
The patent replaces traditional mechanical authentication systems (passwords, physical tokens, centralized databases) with a cryptographic system based on public-private key pairs. The verification process uses cryptographic challenges and responses instead of mechanical credential checking, substituting mathematical cryptography for traditional authentication mechanisms to achieve both high security and user convenience
Solution Approach 2:
The patent introduces cryptographic nonces as intermediaries in the authentication process. These unique challenge values mediate between the verification system and the user's credentials, enabling secure verification without directly exposing or transmitting sensitive authentication data, thus resolving the contradiction between security and ease of operation
2Ease of operation
If centralized credential databases are used, then ease of operation is improved through centralized management, but vulnerability to large-scale breaches increases
Solution Approach 1:
The patent segments authentication credentials into distributed cryptographic key pairs stored locally on user devices rather than centralized databases. Each user maintains their own private keys locally, eliminating the single point of failure in centralized credential storage while maintaining ease of operation through standardized cryptographic protocols
Solution Approach 2:
The patent uses cryptographic public keys as secure copies that can be freely distributed to verification systems without compromising security. The public key acts as a safe copy that enables verification functionality while the sensitive private key remains localized, reducing breach vulnerability while maintaining operational convenience
3Ease of operation
If static credentials (passwords, tokens) are used, then ease of operation is maintained through simple authentication, but security deteriorates due to theft and reuse
Solution Approach 1:
The patent transforms static credentials into dynamic authentication through cryptographic nonces that change with each authentication session. The challenge-response mechanism ensures that credentials are never static or reusable, with each authentication requiring a unique cryptographic proof, thereby maintaining simplicity while dramatically improving security against theft and reuse
Solution Approach 2:
The patent changes the fundamental parameters of authentication from static credential matching to dynamic cryptographic verification. By using variable nonces and cryptographic transformations, the system maintains operational simplicity while eliminating the security vulnerabilities inherent in static credential systems
Data Source
AI summary
Provided are techniques for cryptographically verifying identity that include: obtaining, by a first entity, a cryptographic private key associated with a user; obtaining, by a second entity, a cryptographic public key corresponding to the private key; generating, by the second entity, a nonce; encrypting, by the second entity, the nonce using the public key; hashing, by the second entity, the nonce; transmitting, from the second entity to the first entity, the encrypted nonce; decrypting, by the first entity, the encrypted nonce using the private key; transmitting, from the first entity to the second entity, the decrypted nonce; hashing, by the second entity, the decrypted nonce; determining, by the second entity, that the decrypted nonce hash matches the nonce hash; and verifying, based on the determination, a digital identity of the user.