Video Stream Encryption Using Dual-Algorithm I-Frame Protection
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Solution Overview
Problem
Existing methods for encrypting video streams struggle to balance security and efficiency, resulting in slow encryption speeds and inadequate protection against tampering.
Innovation Solution
A method that encrypts a video stream by using a first encryption algorithm for the data part of an I frame, further encrypting the encryption key with a second algorithm, and storing the encrypted key in the frame header, while performing hash operations on subsequent frames to ensure integrity and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing encryption methods are used to ensure video stream security, then encryption security is improved, but encryption speed deteriorates
Solution Approach 1:
The video stream is segmented into I-frames and P-frames, with different encryption strategies applied to each type. I-frames undergo full encryption while P-frames use differential encryption based on hash values, dividing the encryption task into manageable segments that balance security and speed
Solution Approach 2:
Different encryption qualities are applied to different parts of the video stream. I-frames receive comprehensive encryption for maximum security, while P-frames receive localized encryption only for modified regions, optimizing the balance between security and processing efficiency
2Reliability
If complex encryption methods are used to prevent tampering, then encryption security is improved, but device complexity increases
Solution Approach 1:
Hash values of I-frames are pre-calculated and embedded into P-frames before transmission. This preliminary action enables efficient tamper detection during playback without requiring complex real-time verification mechanisms
Solution Approach 2:
Hash values serve as intermediary elements that link I-frames and P-frames. These intermediaries enable tamper detection through simple comparison operations rather than complex cryptographic verification, reducing device complexity
Data Source
AI summary
The present application provides a method and a device for encryption of a video stream, a communication equipment, and a storage media. The method for encryption of a video stream includes: acquiring a video stream, encrypting a data part of an I frame by using a first encryption algorithm to obtain a first encrypted data, and encrypting an encryption key of the first encrypted data by using a second encryption algorithm to obtain a second encrypted data, and storing the second encrypted data in a frame header of the I frame to obtain an encrypted I frame.