Cluster Peering Authentication via Split Key Derivation
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Solution Overview
Problem
Conventional cluster peering techniques provide inadequate protection against internal attacks, as they lack robust authentication mechanisms, making it possible for attackers to impersonate peered clusters and access internal data.
Innovation Solution
A secure pairing protocol that uses a shared passphrase and independently generated data to derive a common pairing key, which is split into portions for authentication and secret code generation, ensuring secure communication without exchanging authentication information directly between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cluster peering techniques are used, then device complexity is reduced and ease of operation is improved, but authentication security and data protection are insufficient
Solution Approach 1:
The authentication protocol is segmented into distinct phases: initial pairing authentication using a shared passphrase, and subsequent communication authentication using derived secret codes. This segmentation allows complex security requirements to be met while maintaining operational simplicity through clear phase separation.
Solution Approach 2:
A shared passphrase is established in advance between clustered devices before peering occurs. This preliminary action enables secure authentication without requiring complex real-time verification protocols, as the passphrase serves as a pre-shared foundation for trust.
2Reliability
If authentication information is exchanged directly between devices, then authentication speed is improved, but security is compromised as authentication data may be intercepted
Solution Approach 1:
A secret code is introduced as an intermediary element that proves authentication without exposing the underlying passphrase. The secret code is derived from the passphrase but can be exchanged independently, allowing verification of authentication status without transmitting sensitive authentication credentials.
Solution Approach 2:
The secret code serves as a cryptographic copy or representation of the authentication relationship. Instead of exchanging the actual passphrase, devices exchange this derived code that proves mutual authentication without revealing the original secret.
3Reliability
If robust authentication mechanisms are implemented, then data protection is improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The shared passphrase serves multiple functions: it authenticates the initial pairing, derives the secret code for future communications, and establishes trust between devices. This multi-functionality reduces implementation complexity by eliminating the need for separate authentication mechanisms for different communication phases.
Solution Approach 2:
The system transforms the static passphrase into dynamic secret codes through cryptographic derivation. This parameter change allows the same underlying secret to provide both long-term authentication and session-specific verification, simplifying implementation while maintaining strong security.
Data Source
AI summary
A method and system for authenticating of the pairing of computing devices is described. In an example, a passphrase is established on computing devices. The pairing between two devices is initiated by a first device by communicating independently generated data, wherein the generated data is used along with the passphrase on each of the devices to derive a common pairing key. The pairing is authenticated by using at least a first portion of the common pairing key through a key exchange protocol. Further, a shared secret code is derived using a second portion of the common pairing key and stored to be used indirectly to secure future communication between the paired devices.