VPN Authentication Packet Encryption for Secure Server Handshake

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Solution Overview

Problem

Existing VPN systems face issues with the security and efficiency of user authentication processes, particularly in the communication between VPN servers and authentication servers, which can lead to private information compromise and resource inefficiency.

Innovation Solution

Implementing an authentication procedure that uses encryption and decryption algorithms, utilizing a nonce and a symmetric key to encrypt and decrypt authentication packets, thereby securing private information and optimizing resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional authentication procedures are used in VPN systems, then the authentication process is simpler to implement, but security is compromised and private information may be exposed

Engineering Contradiction:

Improveauthentication securityVSAvoidauthentication procedure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs preliminary actions by establishing encrypted TCP connections before authentication occurs. The VPN server and authentication server pre-establish secure communication channels using encryption algorithms, ensuring that when authentication data is transmitted, the pathway is already secured. This preliminary encryption setup prevents exposure of private information during the authentication process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary encryption layer between the VPN server and authentication server. Instead of direct unencrypted communication, all authentication packets are encrypted using symmetric keys and transmitted through secured TCP connections. This intermediary encryption mechanism acts as a mediator that protects private information while maintaining the authentication functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If constant TCP connections are maintained for authentication, then authentication can be performed, but resource utilization becomes inefficient

Engineering Contradiction:

Improveauthentication efficiencyVSAvoidserver resource consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The system implements periodic action by establishing TCP connections only when authentication is needed rather than maintaining constant connections. The VPN server creates encrypted TCP connections to the authentication server on-demand during authentication events, allows these connections to be closed after authentication completes, and re-establishes them only when subsequent authentication is required. This periodic connection pattern reduces resource consumption while maintaining authentication efficiency.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12531834B2Authentication procedure in a virtual private network

Publication Date: 2026.01.20 UAB 360 IT

AI summary

The disclosure discloses a first server determining an encrypted authentication packet including (i) a crypted code field that indicates a type of the encryption authentication packet, (ii) a crypted payload field that includes an encrypted initial authentication packet, determined by utilizing a nonce, an encryption key, and an encryption algorithm, and (iii) a data length field that indicates a length of the encrypted authentication packet, the length including a sum of a length of the crypted code field, a length of the crypted payload field, and a length of the data length field. The method may also include transmitting, by the first server to a second server, the encrypted authentication packet to enable the first server and the second server to conduct an authentication process. Various other aspects are contemplated.