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Flexible Verification of MPEG-4 Stream in Peer-to-Peer CDN

机译:对等CDN中MPEG-4流的灵活验证

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摘要

The current packet based stream authentication schemes provide effective and efficient authentication over a group of packets transmitted on erasure channels. However, by fixing the packets in transmission, any packet manipulation will cause authentication failure. In p2p content delivery network where a proxy-in-the-middle is able to store, forward, transcode and transform the stream, previous schemes are simply unapplicable. To address the problem, we propose a flexible verification scheme that relies on special stream formats (i.e. Unequal Loss Protection ULP scheme). We apply the so called Unequal Loss Verification ULV scheme into MPEG-4 framework. The encoding, packing, amortizing and verifying methods are elaborated in this paper. Our analysis shows that the scheme is secure and cost effective. The scheme is indeed content aware and ensures the verification rate intuitively reflecting a meaningful stream. Further on, we describe the general method of publishing and retrieving a stream in p2p CDN.
机译:当前的基于分组的流认证方案对在擦除信道上传输的一组分组提供有效的认证。但是,通过固定传输中的数据包,任何数据包操作都将导致身份验证失败。在中间代理能够存储,转发,转码和转换流的p2p内容交付网络中,以前的方案根本不适用。为了解决这个问题,我们提出了一种灵活的验证方案,该方案依赖于特殊的流格式(即不平等丢失保护ULP方案)。我们将所谓的不等损验证ULV方案应用于MPEG-4框架。阐述了编码,打包,摊销和验证方法。我们的分析表明,该方案是安全且具有成本效益的。该方案确实具有内容意识,并确保验证率直观地反映出有意义的流。进一步,我们描述了在p2p CDN中发布和检索流的一般方法。

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