Secure Communication Bitstream Encryption Key Management
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Solution Overview
Problem
Existing secure communication methods rely on servers for key distribution, risking user information leakage and compatibility issues with existing communication networks and codec algorithms during inter-terminal secure communication.
Innovation Solution
A secure communication method and apparatus that encrypts a payload region of a bitstream, inserts key information into the bitstream, and transmits it, allowing secure communication between terminals without a server, while maintaining compatibility with existing networks and codec algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate server is used for key distribution and management, then secure communication can be established, but user information remains in the server creating a risk of outflow and user unease
Solution Approach 1:
The patent extracts the key distribution function from the server infrastructure and relocates it to the terminals themselves. Each terminal generates and manages its own encryption keys locally, eliminating the need for a centralized key distribution server. This extraction of the key management function from the server resolves the contradiction by maintaining security capabilities while removing the server as a potential vulnerability point for information outflow.
Solution Approach 2:
The patent implements self-service key management where terminals autonomously generate, store, and manage their own encryption keys without requiring external server assistance. The terminal performs key generation, key storage, and key usage operations independently, enabling secure communication while eliminating dependency on server-based key distribution infrastructure.
2Reliability
If the entire call packet is encrypted and transmitted, then secure communication is achieved, but compatibility with existing communication networks and codec algorithms is lost
Solution Approach 1:
The patent segments the call packet into distinct components: header information and payload data. Only the payload region containing actual voice or data content is encrypted, while the header remains unencrypted to maintain compatibility with existing network protocols and codec algorithms. This selective segmentation allows secure transmission of sensitive data while preserving interoperability with legacy infrastructure.
Solution Approach 2:
The patent applies different quality characteristics to different parts of the data stream. The payload region receives encryption processing for security, while the header region maintains its original unencrypted form for protocol compatibility. This local differentiation of processing quality enables simultaneous achievement of security requirements and network compatibility.
3Reliability
If key information is transmitted through a separate channel, then security is enhanced, but device complexity and protocol requirements increase
Solution Approach 1:
The patent merges the key information transmission with the existing data transmission channel by embedding encrypted key information within the payload region of the call packet. Instead of requiring a separate key transmission channel, the key data is combined with the voice or data payload, utilizing the existing communication infrastructure for both purposes and thereby reducing system complexity.
Solution Approach 2:
The communication channel is designed to serve multiple functions simultaneously: transmitting both voice/data payload and encryption key information through the same transmission path. This multi-functionality eliminates the need for dedicated key transmission infrastructure, reducing device complexity while maintaining security through proper encryption of the key information within the payload.
Data Source
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AI summary
A secure communication apparatus may include a security module for generating an encrypted bitstream by encrypting at least a portion of data forming a bitstream and inserting at least a portion of key information used in the encryption into the bitstream and for decrypting encrypted data by acquiring at least a portion of key information for the decryption from a received encrypted bitstream, and a communication module for transmitting and receiving the encrypted bitstream.