Selective Multimedia Stream Encryption via Region-Based Packet Segmentation
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Solution Overview
Problem
Existing multimedia stream encryption techniques are computationally intensive and can affect playback operations like seek, fast forward, and rewind, as they encrypt the entire stream rather than selective regions.
Innovation Solution
A system and method for encrypting multimedia streams by selecting and encrypting specific regions within data packets using encryption algorithms, embedding encryption information, and using a custom stream to manage decryption, allowing for efficient encryption and decryption without affecting playback functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire multimedia stream is encrypted, then security of multimedia content is improved, but computational complexity increases and playback operations are affected
Solution Approach 1:
The patent divides the multimedia stream into individual data packets and selectively encrypts only specific regions within each packet (such as payload portions containing sensitive content) rather than encrypting the entire stream. This segmentation approach reduces the volume of data requiring encryption while maintaining security for critical content areas.
Solution Approach 2:
The patent applies different encryption treatments to different regions within data packets based on their sensitivity and functional requirements. Critical regions like payload portions are encrypted while less sensitive regions such as headers may remain unencrypted or use different encryption methods, optimizing the balance between security and computational efficiency.
2Reliability
If the entire multimedia stream is encrypted, then security of multimedia content is improved, but playback operations like seek, fast forward, and rewind are affected
Solution Approach 1:
By encrypting only specific regions within data packets rather than the entire stream, the patent enables playback operations to access and manipulate unencrypted or less sensitive portions of the data structure, facilitating seek, fast forward, and rewind operations without requiring decryption of the entire stream.
Solution Approach 2:
The patent applies encryption partially to only the necessary regions within data packets that contain sensitive multimedia content, leaving other regions in a state that allows for efficient random access and playback control operations.
Data Source
AI summary
A method and system for encrypting data packets in a multimedia stream are disclosed. Each data packet includes a header portion and a payload portion. In one embodiment, one or more data packets are selected from an incoming multimedia stream. Further, one or more of a header portion and a payload portion are selected within the one or more data packets. Furthermore, one or more regions in the selected one or more of the header portion and the payload portion are encrypted using an encryption algorithm.