Multi-Source Stream Authentication Framework in Case of Composite MPEG-4 Stream

摘要

Multimedia community is moving from monolithic applications to more flexible and scalable integrated solutions. Stream authentication is more complex since a stream may consist of multiple sources and be transcoded by intermediate proxies. In this paper, we propose a multi-source stream authentication (mSSA) framework based on MPEG-4 stream format. We describe the overall authentication architecture and elaborate the encoding, hashing, signing, amortizing and verifying methods used in the basic scheme. Further on, we utilize advanced cryptographic primitives-aggregate signature schemes, to reduce the signatures' size and improve the performance. We illustrate the scheme and discuss the extensions. Our analysis shows that the scheme is secure and efficient.