CAREER: Signal Processing Approaches for Multimedia Security and Information Protection

MD College Park0133704的闵武认识到，没有多媒体数据安全和保护的保障，信息技术时代提供的优势就无法充分发挥，本项目重点研究通过两种互补的信号处理技术，即多媒体加密和数据嵌入来实现多媒体安全和信息保护。多媒体加密的主要功能是保护机密性，从而实现访问控制，而数据嵌入或数字水印则涉及如何将一组不可感知的数据无缝地与宿主媒体相关联。嵌入的数据即使在解密后也可以用于所有权验证或认证。本项目的研究部分包括三个部分。研究人员首先通过设计和分析基于信号处理的加密算法来探索在三种不同威胁级别下的内容机密性保护，这些加密算法计算效率高，易于与有损通信兼容。此外，基于分层算法体系结构，研究了多媒体数据隐藏新的挑战性问题，并开发了软件实验平台。最后，该计划探讨加密技术和资料隐藏技术的联合使用，以及两者之间的相互作用，以提供全面的保护。这项计划的教育部分集中于两个主题，即利用多媒体作为提高多媒体教育生产力的有力工具，以及使用精心设计的项目为学生提供实践经验，使他们为加入未来的信息技术大军做好准备。除了课程开发外，调查员还特别努力培养代表不足的学生，特别是年轻女性，并吸引他们进入EE/CS学科。

Min WuU of MD College Park0133704Having recognized that the advantages offered by the information technology era cannot be fully deployed without the guarantee on the security and protection of multimedia data, this project focuses on the investigation of multimedia security and information protection through two types of complementary signal processing techniques, namely, multimedia encryption and data embedding. The main function of multimedia encryption is to protect the confidentiality and thus performs access control, while data embedding or digital watermarking concerns how to associate a set of imperceptible data with the host media in a seamless way. The embedded data can be used to accomplish ownership verification or authentication evenafter decryption.The research component of this project involves three parts. The investigator first explores the protection of content confidentiality under three different levels of threats by designing and analyzing signal processing based encryption algorithms that are computationally efficient and easily compatible with lossy communications. In addition, new challenging problems of multimedia data hiding are studied based on alayered algorithmatic architecture, and a software testbed is developed. Finally, the project investigates the joint use of encryption and data hiding as well as their interplay for providing comprehensive protection.The educational component of this project focuses on two themes, namely, using multimedia as a powerful tool to enhance the productivity of multimedia education, and using carefully designed projects to providestudents with hands-on experience that will well prepare them for joining the future technical force of information technology. In addition to the curriculum development, the investigator makes special effort to nurture the under-represented students especially young women and to attract them to step into the EE/CS disciplines.