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文件名称:Scalable Authentication of MPEG-4 Streams
文件大小:433KB
文件格式:PDF
更新时间:2011-09-27 09:27:44
MPEG-4
Abstract—This paper presents three scalable and efficient
schemes for authenticating MPEG-4 streams: the Flat Authentication
Scheme, the Progressive Authentication Scheme, and
the Hierarchical Authentication Scheme. All the schemes allow
authentication of MPEG-4 streams over lossy networks by integrating
seamlessly digital signatures and erasure correction coding
with MPEG-4’s fine granular scalability. A prominent feature of
our schemes is their “sign once, verify many ways” property, i.e.,
they generate only one digital signature per compressed MPEG-4
object group, but allow clients to verify the authenticity of any
down-scaled version of the original signed object group.