Multi-security-level video encryption algorithm based on H.265

• Main Authors: CAO XIAOZHE, ZHU ZHILIANG, ZHANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2018
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention provides a multi-security-level video encryption algorithm based on H.265, wherein the algorithm relates to the field of video encryption technology. Through analyzing characteristics and security requirement of a video in reality, a traditional single encryption plan is improved. Firstly video types in a network are classified, thereby determining three application scenes. In a first scene, the video quality is fuzzy and visible, such as paid television. In a second scene, the video image is invisible to the unauthorized user, such as a video conference. A third scene is a moreconfidential scene in which hiding of video motion information is required, such as military maneuver. Secondly, an encryption object is selected according to the security requirement. Then, a high-efficiency key generation plan is brought forward. A method of combining chaotic and Hash functions is utilized for obtaining a classifying key. A sub-key is selected for aiming at the parameter characteristic. An XOR operation