Callback Server Secure Data Relay

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Solution Overview

Problem

Satellite television systems face inefficiencies in communicating callbacks to a head end due to high costs and time consumption associated with using telephone modems, necessitating a more efficient means for data communication.

Innovation Solution

A method and system utilizing a callback server module to securely communicate encrypted callback data signals between user devices and a head end, involving the establishment of multiple sessions for verification and decryption, reducing reliance on costly telephone connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a telephone modem is used to communicate callbacks to a head end, then the callback data can be transmitted, but the cost and time consumption increase significantly

Engineering Contradiction:
Improvecallback data transmissionVSAvoidcallback communication time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent introduces a callback server as an intermediary component between the set-top box and the head end. The callback server receives encrypted callback data from the set-top box, verifies its authenticity, and forwards it to the head end. This intermediary architecture eliminates the need for expensive telephone modem connections while maintaining secure and reliable data transmission, thereby reducing both cost and time consumption.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If a telephone modem is used to communicate callbacks to a head end, then the callback data can be transmitted, but the cost increases significantly

Engineering Contradiction:
Improvecallback data transmissionVSAvoidcommunication cost
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent replaces the mechanical telephone modem communication system with an electronic data transmission system over existing network infrastructure. Instead of using analog telephone lines and modems, the system transmits encrypted callback data electronically through the callback server, eliminating telecommunication charges while maintaining transmission reliability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If encryption and verification processes are implemented for callback data, then security is improved, but system complexity increases

Engineering Contradiction:
Improvecallback communication securityVSAvoidsession management complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the complex encryption and verification logic from the set-top box and concentrates it in the callback server. The set-top box simply encrypts callback data and sends it to the callback server, which handles session management, verification, and forwarding. This extraction of complexity to a dedicated server simplifies the set-top box while maintaining robust security through centralized verification processes.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS9313532B1Method and system for securely performing callbacks in a content distribution system
Publication Date: 2016.04.12 DIRECTV LLC
  • US9313532B1 patent drawing
  • US9313532B1 patent drawing
  • US9313532B1 patent drawing

AI summary

A system for securely communicating callback signals to a head end includes a callback server and a user device communicating a request to open a callback session to the callback server. The callback server opens a first session between the callback server and a user device. The user device communicates an encrypted callback data signal to the callback server through the first session. The callback server opens a second session between the callback sever and a conditional access system associated with a head end, verifies the callback data signal at callback server, and communicates the encrypted callback data signal to the conditional access system through the second session. The conditional access system decrypts the encrypted callback data signal to form decrypted callback data.