Session Key Derivation via Challenge-Response Authentication
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Solution Overview
Problem
Existing authentication systems fail to simultaneously secure both devices and data, particularly in wireless communications, where 'man-in-the-middle' attacks can intercept and alter data even after device authentication, and conventional solutions rely on secret keys that are vulnerable to interception.
Innovation Solution
Implementing a challenge-response protocol using elliptic curve asymmetric authentication to derive a session key known to both devices, which is used for authenticating devices and securing data exchanges, thereby preventing 'man-in-the-middle' attacks and ensuring data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional authentication systems are used, then device authentication can be achieved, but data security is compromised due to vulnerability to man-in-the-middle attacks
Solution Approach 1:
The patent merges device authentication and data authentication into a single integrated system. The authentication device performs both functions simultaneously: authenticating the identity of communication devices and authenticating data packets during transmission. This eliminates the security gap where device authentication occurred but data remained vulnerable to interception.
Solution Approach 2:
The patent introduces an intermediary authentication mechanism using challenge-response protocols and session keys. The authentication device acts as a mediator that establishes secure communication channels, generates session-specific keys, and verifies data integrity before allowing data transmission, thereby preventing man-in-the-middle attacks.
2Reliability
If secret keys are used for authentication, then authentication security can be maintained, but the keys become vulnerable to interception and compromise
Solution Approach 1:
The patent transitions from static secret keys to dynamic session keys that are generated on-demand during each authentication session. The challenge-response protocol creates unique session-specific keys that change with each communication, making intercepted keys useless for subsequent attacks. This dynamic key generation eliminates the vulnerability of persistent secret keys.
Solution Approach 2:
The patent performs preliminary authentication actions before data transmission begins. The challenge-response protocol establishes trust and generates secure session keys in advance, creating a secure foundation before any actual data communication occurs. This preliminary security setup prevents key interception during data transmission.
3Reliability
If separate authentication mechanisms are used for devices and data, then each function can be optimized, but system complexity increases
Solution Approach 1:
The patent combines device authentication and data authentication into a single integrated authentication device and protocol suite. The same authentication device handles both functions, and the challenge-response protocol simultaneously establishes device identity verification and data integrity protection, eliminating the need for separate complex systems.
Data Source
AI summary
Embodiments relate to systems and methods for authenticating devices and securing data. In embodiments, a session key for securing data between two devices can be derived as a byproduct of a challenge-response protocol for authenticating one or both of the devices.