Protecting VoD the easier way

Griwodz, Carsten; Merkel, Oliver; Dittmann, Jana; Steinmetz, Ralf

doi:10.1145/290747.290751

Cited by 34 publications

(15 citation statements)

References 9 publications

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“…When a proxy is present, the major approach for distribution control relies on encryption and decryption and focuses on improving their efficiencies. For example, early work [17], [18], [19] considers how to speed up the decryption and encryption process. The scheme proposed in [11] relies on costly hardware support to deal with member collusion.…”

Section: Related Workmentioning

confidence: 99%

Efficient Proxy-Based Internet Media Distribution Control and Privacy Protection Infrastructure

Chen

Guo

et al. 2006

200614th IEEE International Workshop on Quality of Service

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Abstract-Massive Internet media distribution demands prolonged continuous consumption of networking and disk bandwidths in large capacity. Many proxy-based Internet media distribution algorithms and systems have been proposed, implemented, and evaluated to address the scalability issue. However, few of them have been used in practice, since two important issues are not satisfactorily addressed. First, existing proxy-based media distribution architectures lack an efficient media distribution control mechanism. Without protection on the Internet, content providers are hesitant to use existing fast distribution techniques. Second, little has been done to protect client privacy during client accesses. Straightforward solutions to address these two issues independently lead to conflicts. For example, to enforce distribution control, only legitimate users should be granted access rights. However, this normally discloses more information (such as which object the client is accessing) other than the client identity, which conflicts with the client's desire for privacy protection. In this paper, we propose a unified proxy-based media distribution protocol to effectively address these two problems simultaneously. We further design a set of new algorithms for cooperative proxies where our proposed scheme works practically. Simulation results show that our proposed strategy is efficient.

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Section: Related Workmentioning

confidence: 99%

Efficient Proxy-Based Internet Media Distribution Control and Privacy Protection Infrastructure

Chen

Guo

et al. 2006

200614th IEEE International Workshop on Quality of Service

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“…The efficacy of encrypting headers is summarily rejected in some cases by others (Griwodz [10], for example, states "reconstruction of headers in MPEG-1 is relatively simple because current encoders produce CBR streams and use always the same header data anyway"), a point which we will examine more critically in Section 4 below. Encrypting headers may also have consequences for the ability of intermediate processing that uses headers to be applied to an encrypted stream [39].…”

Section: 3mentioning

confidence: 99%

“…Random Corruption Griwodz et al [9,10] propose randomly corrupting MPEG video information (that would be cached close to users); the correct bytes are sent to a user at the time the content decoding is enabled. Contrary to many other researchers (who are targeting secrecy or are unclear on what level of security they are trying to achieve), Griwodz et al find approximately 1% of bytes degraded to satisfactory achieve their goal of rendering movie content undecodable or unwatchable.…”

Section: 8mentioning

confidence: 99%

Security analysis of selectively encrypted MPEG-2 streams

Lookabaugh¹,

Sicker²,

Keaton³

et al. 2003

SPIE Proceedings

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Selective encryption exploits the relationship between encryption and compression to reduce encryption requirements, saving in complexity and facilitating new system functionality. Selective encryption of MPEG video streams has been proposed in a number of variations, yet has seen little application to date. Here we focus on high encryption savings, targeting 10% of the bit stream or less encrypted, moderate security in the sense that the content is degraded to the point that purchase would be preferred over consuming free content, no impact on compression efficiency, and a cryptanalytic approach to validating security. We find that adequate security is plausible if the compressor is cooperative or at least neutral with respect to the selective encryption system, but implausible if the compressor is operated antagonistically. The unusually low encryption targeted makes application of this solution appealing.

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“…Yet another approach [17] proposes to multicast corrupted content, and unicast correction codes, so that the corrected plaintext bears a watermark. Since the correction codes are much smaller than the content being multicast, the technique is adequate for large numbers of receivers.…”

Section: Protection Of Multicast Contentmentioning

confidence: 99%

Issues in Multicast Security

2000

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Abstract. Multicast communications introduce significant novelties both at the Network and Transport layers. The relevant applications, on the other hand, have special requirements, determined by the real-time and multimedia nature of the data and by the large number of receivers. This paper first discusses the basics of multicast routing and transport, and the concept of a multicast "session". Then, it analyses the security services that are needed and the difficulties that arise in this context. The techniques that have been proposed for solving different multicast security problems are briefly surveyed.

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Protecting VoD the easier way

Cited by 34 publications

References 9 publications

Efficient Proxy-Based Internet Media Distribution Control and Privacy Protection Infrastructure

Efficient Proxy-Based Internet Media Distribution Control and Privacy Protection Infrastructure

Security analysis of selectively encrypted MPEG-2 streams

Issues in Multicast Security

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