Inline CA Certificate Exchange for Secure Backup File Transfer
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Solution Overview
Problem
Managing and updating certificates for secure communications channels in large-scale environments with thousands of clients and servers is cumbersome, requiring significant overhead and separate applications for certificate management.
Innovation Solution
A method where a backup server sends a certificate authority (CA) certificate inline as part of the authentication sequence, using a pre-shared key to establish a secure communications channel, allowing clients to verify server identity and transition to more secure cipher-suites without additional certificate management overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If certificate-based authentication is implemented in large-scale environments with thousands of clients, then security is improved, but device complexity and operational overhead increase significantly
Solution Approach 1:
The patent merges certificate management functionality directly into the file transfer protocol itself, combining what were previously separate functions (certificate distribution, verification, and renewal) into the existing FTP authentication framework. This eliminates the need for separate certificate management applications and reduces operational overhead while maintaining security.
Solution Approach 2:
The protocol is designed to be universal, supporting both traditional authentication methods and certificate-based authentication within the same framework. The server can handle multiple client types and authentication modes simultaneously, making the system adaptable to large-scale environments with diverse clients while maintaining a single management interface.
2Measurement precision
If separate applications are deployed for certificate management, then certificate verification accuracy is improved, but productivity decreases due to additional overhead
Solution Approach 1:
The patent combines certificate verification functionality directly into the file transfer protocol's authentication sequence. The server verifies client certificates as part of the normal FTP login process, eliminating the need for separate verification applications. This maintains verification accuracy while significantly improving productivity by removing redundant operational steps.
3Reliability
If traditional certificate distribution methods are used, then security is maintained, but loss of time increases due to manual certificate updates across thousands of clients
Solution Approach 1:
The protocol enables self-service certificate management where clients automatically receive and update certificates through the normal file transfer authentication process. When the server needs to distribute or renew certificates, it does so through the existing protocol infrastructure without requiring manual intervention at each client. This maintains security through automated verification while dramatically reducing the time required for certificate updates across large numbers of clients.
Data Source
AI summary
Systems and methods for using certificate authority certificates inline as part of a file transfer protocol are described. A backup system may receive a request from a client system for a first secure communications channel secured with a previously-shared encryption key. The backup system may transmit a message via the first secure communications channel that indicates that the backup system is one-way CA certificate encryption capable based on the client version of the backup application of the client system. In response to a query, received via the first secure communications channel, to create a second secure communications channel, the backup system may transmit, via the first secure communications channel, the one-way CA certificate after a comparison of security settings indicates that one-way CA certificate encryption is the highest encryption level available. The second secure communications channel may then be set up to transmit encrypted client data.