Encrypted Data Stream Analysis via Key Packet Insertion
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Solution Overview
Problem
In communication networks, particularly in Voice over IP, diagnosing errors in encrypted data streams transmitted using the RTP protocol is challenging due to the unavailability of key information during connection signaling, which is encrypted and not accessible for analysis or diagnosis.
Innovation Solution
Inserting key data packets into the data streams that contain data-stream-specific key information, allowing for the decryption of the streams during analysis, with the key information being transmitted in a way that it cannot be read by standard network protocol receivers, and using a new or unused payload type to ensure security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data streams are encrypted for security, then security is improved, but the ability to analyze or diagnose errors in the data streams deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism by inserting key data packets into the encrypted data streams. These key data packets serve as mediators that carry decryption information without compromising the overall encryption security. The intermediary allows the analysis device to obtain necessary key information while the standard RTP receiver remains unable to access it, thus resolving the contradiction between maintaining security and enabling error analysis.
2Difficulty of detecting and measuring
If key information is made available for data stream analysis, then error diagnosis capability is improved, but security deteriorates as key information becomes accessible
Solution Approach 1:
The patent applies local quality by making key information available only at specific locations (key data packets inserted into the stream) and only to specific devices (analysis devices with special capability). The standard RTP receivers continue to see only encrypted data. This localized availability of decryption information enables error diagnosis without compromising overall system security, as the key information is not universally accessible.
3Productivity
If multiple data streams are transmitted simultaneously, then communication efficiency is improved, but the administrative effort for analyzing each stream individually increases
Solution Approach 1:
The patent merges the key information transmission with the data stream transmission by inserting key data packets directly into the encrypted streams. This combining approach allows a single analysis device to access and process key information for multiple simultaneously transmitted data streams through one unified interface, eliminating the need for separate administrative operations for each stream and thus reducing overall administrative effort while maintaining high communication efficiency.
Data Source
Figure 1~2
AI summary
In a data stream individually encoded data stream (dsl..n), data packets formed as key data packets (spl..n) are to be inserted, with which the data stream-individual key information (sil..n) is transmitted with the associated data stream (dsl..n). For analyzing and/or recording, at least one key data packet (spl..n) is searched for in the associated data stream (dsl..n), and the data stream-individual key information (sil..n) is determined. By means of the data stream-individual key information (sil..n), the associated data stream (dsl..n) is decoded. The generation and insertion of key information (sil..n) can be achieved with minor administrative effort, thus considerably reducing the effort for the analysis or diagnosis (dsl..n) of the simultaneously transmitted, encoded data streams (dsl..n). Advantageously, the insertion of key data packets can only be activated or initiated if the diagnosis or analysis and/or recording of the data streams is currently carried out.