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...thorized access to such information using cryptographic protocols. W3C XML Encryption 4 working group has proposed an XML syntax for encrypting or decrypting digital content in XML documents. Giereth =-=[5]-=- has studied the hiding of a fragment of an RDF document by encrypting it while the rest of the document remains publicly readable. These access control policies and encryption techniques either allow...

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...ross & Sommer 2006) 2 E Y N 2 0 0 (Chang & Hwang 2007) 0 U N Y 1 2 0 (Chen et al. 2005) 2 U Y N 2 0 0 (Cho 2006) 2 U Y N 2 0 0 (Delgado et al. 2001) 0 U Y N 1 0 0 (Geuer-Pollmann 2002) 0 U N Y 0 2 0 (=-=Giereth 2005-=-) 0 U Y N 1 2 0 (Hormann et al. 2006) 0 E N N 0 0 2 (Hung et al. 2003) 2 U Y N 2 2 0 (Hussain & Soh 2004) 0 U N Y 2 0 0 (Hwang & Chang 2004) 0 U N Y 2 2 0 (Imamura et al. 2002) 0 E Y N 0 2 0 (Kim & Mo...

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...sed solution [8] and delegates attribute anonymisation to the client side, thus sensitive information is not disclosed to the server. We rely on partially encrypted RDF graphs, as proposed by Giereth =-=[11]-=-. Before building the RDF attribute graph and sending it to the Shi3ld-protected repository, a partial RDF encryption is performed, producing RDF-compliant results, i.e., the encrypted graph is still ...

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...ntial to extend well-established data formats for describing the structure of social networks such as FOAF with access control techniques. The mechanisms for signing RDF graphs have been presented in =-=[15]-=-. The combination of FOAF and SSL [37] enables secure access to FOAF profiles. The embedding of access control mechanisms in FOAF has been illustrated in [20, 23]. 7. CONCLUSION AND FUTURE WORK In thi...

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...tial to extend well-established data formats for describing the structure of social networks such as FOAF with access control techniques. The mechanisms for signing RDF graphs have been presented in [=-=Giereth, 2005-=-]. The combination of FOAF and SSL [Story et al., 2010] enables secure access to FOAF profiles. The embedding of access control mechanisms in FOAF has been illustrated in [Hollenbach et al., 2005; Kru...

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...ppen. Apart from changing the RDF specification, none of these methods actually solves the problem and they can be seen as workarounds. Other authors also investigated RDF graph hashing, e.g. Giereth =-=[14]-=- for the purpose of encrypting fragments of a graph. Giereth works around the blank node issue by modifying the graph. A more current approach by Kuhn and Dumontier [15] proposes an encoding of hash v...

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...knowledge bases with the open world 87 assumption. Research on encryption of sensitive information focuses on preventing unauthorized access to such information using cryptographic protocols. Giereth =-=[72]-=- has studied techniques for hiding a fragment of an RDF document by encrypting it while the rest of the document remains publicly readable. Abel et al. [73] have proposed a policy-based control of acc...

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...s (see [2] for a survey). For, instance, work on policy languages for the web [3], [12] involves specifying syntax-based restrictions on access to specific resources or operations on the web. Giereth =-=[8]-=- has studied the hiding of a fragment of an RDF document by encrypting it while the rest of the document remains publicly readable. Farkas et al. [5], [11] have proposed a privacy information flow mod...