Attacks on Two Buyer-Seller Watermarking Protocols and an Improvement for Revocable Anonymity

Deng, Mina; Preneel, Bart

doi:10.1109/isecs.2008.103

Cited by 9 publications

(7 citation statements)

References 38 publications

(81 reference statements)

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“…In fact, while it is reasonable to assume that a TTP or a CP can perform complex security actions, it appears to be questionable to make the same assumptions for buyers, who should not be forced to perform actions that cannot be automatically carried out by plugins installed in their web browsers without a competent intervention. In particular, buyers should not be considered able to generate one-time anonymous public and private key pairs based on specific security parameters, or participate in group signature schemes and in interactive zero-knowledge proofs, or generate valid watermarks, or digitally sign or encrypt specific messages [30,50,60,61]. Such an assumption represents a necessary condition to consider a watermarking protocol suited for the current web context, because it is unthinkable that buyers have to do one of the complex actions reported above, if they want to purchase content on the Internet.…”

Section: Design Challengesmentioning

confidence: 99%

Digital Copyright Protection: Focus on Some Relevant Solutions

Frattolillo

2022

Int. j. commun. netw. inf. secur.

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Copyright protection of digital content is considered a relevant problem of the current Internet since content digitalization and high performance interconnection networks have greatly increased the possibilities to reproduce and distribute digital content. Digital Rights Management (DRM) systems try to prevent the inappropriate or illegal use of copyrighted digital content. They are promoted by the major global media players, but they are also perceived as proprietary solutions that give rise to classic problems of privacy and fair use. On the other hand, watermarking protocols have become a possible solution to the problem of copyright protection. They have evolved during the last decade, and interesting proposals have been designed. This paper first presents current trends concerning the most significant solutions to the problem of copyright protection based on DRM systems and then focuses on the most promising approaches in the field of watermarking protocols. In this regard, the examined protocols are discussed in order to individuate which of them can better represent the right trade-off between opposite goals, such as, for example, security and easy of use, so as to prove that it is possible to implement open solutions compatible with the current web context without resorting to proprietary architectures or impairing the protection of copyrighted digital content.

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Section: Design Challengesmentioning

confidence: 99%

Digital Copyright Protection: Focus on Some Relevant Solutions

Frattolillo

2022

Int. j. commun. netw. inf. secur.

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“…One of the main challenges in designing watermarking protocols consists of accurately defining the role played by TTPs in the purchase transactions, since TTPs could collude with the other parties involved in the protocols [17,20,40] so as to impair them. In this regard, the best solution would be to totally eliminate TTPs from protocols.…”

Section: Main Challengesmentioning

confidence: 99%

“…However, such a solution is not always possible, since protocols often need TTPs to validate specific data, or some phases of the protocol, or, for example, the plug-ins that have to be downloaded and installed in the buyers' web browsers to complete the purchase transactions [22,23]. Furthermore, when TTPs play a limited role in the protocols, buyers end up being forced to perform complex security actions to complete the purchase transactions, and this makes the protocols impractical for the web context [17][18][19][20][21][40][41][42][43][44].…”

Section: Main Challengesmentioning

confidence: 99%

A Watermarking Protocol Based on Blockchain

Frattolillo

2020

Applied Sciences

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Digital watermarking can be used to implement mechanisms aimed at protecting the copyright of digital content distributed on the Internet. Such mechanisms support copyright identification and content tracking by enabling content providers to embed perceptually invisible watermarks into the distributed copies of content. They are employed in conjunction with watermarking protocols, which define the schemes of the web transactions by which buyers can securely purchase protected digital content distributed by content providers. In this regard, the “buyer friendly” and “mediated” watermarking protocols can ensure both a correct content protection and an easy participation of buyers in the transactions by which to purchase the distributed content. They represent a valid alternative to the classic “buyer and seller” watermarking protocols documented in the literature. However, their protection schemes could be further improved and simplified. This paper presents a new watermarking protocol able to combine the “buyer friendly” and “mediated” design approach with the blockchain technology. The result is a secure protocol that can support a limited and balanced participation of both buyers and content providers in the purchase transactions of protected digital content. Moreover, the protocol can avoid the direct involvement of trusted third parties in the purchase transactions. This can reduce the actual risk that buyers or sellers can violate the protocol by illicitly interacting with trusted third parties. In fact, such peculiarities make the proposed protocol suited for the current web context.

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“…Among the issues and attacks to be considered [27], our protocol is more concerned by: the "issue of non-repudiation" where the physician or the expert denies the emission or reception of data; the "collusion attack" where both physicians cooperate to circumvent the protocol creating false evidence that acquit them; The "traceability issue" which aim is to identify the persons at the origin of a disclosure. We come back on each of them in the following.…”

Section: Security Analysismentioning

confidence: 99%