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Showing 1 to 11 of 11 for “"Attribute-based Encryption"”.
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Efficient Ciphertext-policy Attribute Based Encryption for Cloud-Based Access Control
… such access control using Ciphertext-policy attribute based encryption (CP-ABE) that can enforce data owners’ access policies to achieve such cryptographic access control and tackle the majority of those concerns. However, some challenges are still outstanding due to the complexity of …
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Frontiers in Lattice Cryptography and Program Obfuscation
… contribution is the construction of a deniable attribute-based encryption scheme from lattices. A deniable encryption scheme is secure against not only eavesdropping attacks as required by semantic security, but also stronger coercion attacks performed after the fact. An attribute-based …
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Arcana: Private tweets on a public microblog platform
… system, which utilizes CP-ABE (Ciphertext Policy Attribute based encryption), allowing the user to select followers based on predefined attributes. Through simple installation and pre-setting, the user can encrypt and decrypt tweets conveniently and can avoid the fear of information leakage.
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Cryptographically enforced access control for user data in untrusted clouds
… to support rich, legacy web applications. Using attribute-based encryption, Sieve allows users to define intuitive, understandable access policies that are cryptographically enforceable. Using key homomorphism, Sieve can re-encrypt user data on storage providers in situ, revoking decryption keys …
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Secure Access to Outsourced Data from Resource-Constrained Devices
… outsourced data encrypted with Ciphertext-Policy Attribute-based Encryption (CP-ABE) from clients using resourceconstrained devices. We make three contributions. First, we address one of the fundamental shortcomings of CPABE schemes of not being able to maintain the data owner control during the …
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Context-Aware Attribute-Based Techniques for Data Security and Access Control in Mobile Cloud Environment
… smart mobile devices to host various Cloud-based services such as Google apps, Instagram, and Facebook. Recent developments in smart devices‟ hardware and software provide seamless interaction between the users and devices. As a result, in contrast to the traditional user, the mobile user in …
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Formal Proofs of Security for Privacy-Preserving Blockchains and other Cryptographic Protocols
… protocols are analysed in chapter 3, where two Attribute Based Encryption schemes are proven secure. First context and motivation are introduced, presenting settings of cloud encryption, alongside the tools used to build ABE schemes. Then the first scheme, that introduces multiple authorities in …
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Social networking: security, privacy, and applications
Online social networks have become ubiquitous and changed the way that users interact online. There has been an enormous growth in the usage of online social networking in the past few years as users share a variety of information including personal profiles, pictures, and messages to socialize …
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Secure Computation in Heterogeneous Environments: How to Bring Multiparty Computation Closer to Practice?
… of a large computation. Our construction is based on attribute-based encryption and avoids expensive primitives such as fully homomorphic encryption andprobabilistically checkable proofs underlying existing VC schemes. Additionally our solution enjoys two new useful properties: public …