Streaming Signal Secure Digital Communication via DTMF Handshake
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Solution Overview
Problem
Current secure digital communication systems in healthcare, such as PACS, face challenges in securely transmitting sensitive medical images and reports over the internet, particularly in preventing Man-In-The-Middle attacks and virus infections, without direct physical connections between intranet and internet.
Innovation Solution
A secure digital communication system using a streaming signal with dual-tone multi-frequency (DTMF) signaling and a streaming media signal that includes QR codes, color images, and video segments, encoded and decoded by a streaming signal CODEC, transmitted through a secure digital communication device with an HDMI interface to ensure secure and reliable data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct physical connections are made between intranet and internet for PACS communication, then ease of operation is improved, but security against MITM attacks and virus infections deteriorates
Solution Approach 1:
The patent introduces a modem as an intermediary device that enables communication between intranet and internet without direct physical connections. The modem converts digital signals to analog and back, acting as a buffer that prevents direct exposure of the intranet to internet threats while maintaining communication capability. This resolves the contradiction by allowing ease of operation through standardized communication protocols while preserving security through physical isolation.
Solution Approach 2:
The patent replaces direct mechanical/physical connections between intranet and internet with acoustic signal transmission through modems. By substituting the mechanical connection with acoustic wave transmission (通过电话线路), the system achieves communication functionality while maintaining physical isolation, thus improving ease of operation without compromising security.
2Reliability
If physical isolation is implemented between intranet and internet, then security is improved, but device complexity increases
Solution Approach 1:
The patent employs standard modems that are multi-functional devices capable of both voice communication and data transmission. By using a universal device that can handle multiple communication protocols and functions, the system achieves security through physical isolation without significantly increasing device complexity, as the modem is a commercially available standard component.
3Reliability
If DTMF handshake signaling is used for secure communication, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent implements DTMF handshake signaling as a preliminary action before actual data transmission. The handshake protocol (including A-tone, B-tone, C-tone, D-tone sequences) establishes security credentials and communication parameters in advance. While this preliminary step increases transmission time, it ensures reliability by verifying authentication and establishing secure communication channels before sensitive medical data is exchanged.
Data Source
AI summary
Aspects of present disclosure relates a streaming signal for transmitting digital contents through a set of secure digital communication devices in a secure digital communication system. The streaming signal includes: an audio handshake signal and a streaming media signal. The streaming signal is transmitted between a first workstation and a second workstation in the secure digital communication system. Digital contents are encoded to the streaming signal by a first streaming signal CODEC of a first secure digital communication device, and transmitted by a first streaming signal transceiver of first secure digital communication device to a second streaming signal transceiver of a second secure digital communication device, a second streaming signal transceiver of second secure digital communication device transmits the streaming signal to a second streaming signal CODEC of second secure digital communication device where the streaming signal is decoded back to the digital contents, and stored in a second workstation.