Design and ARM-Based Implementation of Bitstream-Oriented Chaotic Encryption Scheme for H.264/AVC Video

Area of Science:

• Computer Science
• Information Security
• Digital Communications

Background:

• Real-time video confidential communication demands high security, low latency, and format compatibility.
• Existing encryption methods often compromise one or more of these critical performance indicators.
• Bitstream-oriented encryption (BOE) offers a promising approach for video data security.

Purpose of the Study:

• To propose an improved bitstream-oriented encryption (BOE) method for H.264/AVC video.
• To develop a secure and efficient chaotic encryption algorithm for real-time video.
• To ensure the proposed method meets security, real-time, and format compatibility requirements.

Main Methods:

• A 4-D self-synchronous chaotic stream cipher algorithm with cosine anti-controllers (4-D SCSCA-CAC) was designed for enhanced security.
• H.264/AVC bitstream syntax elements, specifically Motion Vector Difference (MVD) and DC components, were analyzed and extracted.
• Chaotic encryption was applied to extracted syntax elements, followed by re-encoding to maintain H.264/AVC format compatibility.
• Hardware codecs and multi-core multi-threading were utilized to optimize real-time performance.

Main Results:

• The 4-D SCSCA-CAC algorithm effectively resists sophisticated attacks like chosen-ciphertext and divide-and-conquer attacks.
• The BOE method successfully encrypted H.264/AVC video data while preserving format compatibility.
• Experimental results demonstrated simultaneous achievement of security, real-time performance, and format compatibility.
• The system exhibited high efficiency and flexibility in practical applications.

Conclusions:

• The proposed chaotic encryption-based BOE method provides a robust solution for real-time video confidential communication.
• The integration of a secure chaotic cipher and bitstream manipulation ensures comprehensive performance.
• This approach is suitable for ARM-embedded systems requiring secure and efficient video transmission.