[PDF] Top 20 Saúde e atendimento do adolescente em Ceilândia, Distrito Federal

... Attribute-based encryption (ABE) is an advanced public-key encryption system supporting fine-grained access control [31, ...for encryption and issues secret keys to users for decryption; a ... See full document

... in encryption or key generation, we can generate dual orthogonal bases from the pseudorandom function with its input being the slot index when they are ...conditional full-hiding security ... See full document

... the attribute-hiding prop- ...decentralized inner-product predicate encryp- tion for which we provide a construction and a proof of security in the random oracle model, under the ... See full document

... only inner products or even simpler predicates [BW07, KSW08, OT12a, OT12b, OT13, DCIJ + 13], out of which the schemes designed in the more efficient and secure prime order bilinear groups being only the works of ... See full document

... Deniable encryption (Canetti et ...semantic security, but also stronger coercion attacks performed after the ...resilience, adaptive security of protocols, and se- curity against selective ... See full document

... Abstract. Inner product functional encryption (IPFE), introduced by Abdalla et ...functional encryption supporting only inner product ...provides adaptive security ... See full document

... hybrid security proof of their construction, they put further restrictions on the queries of the ad- versaries, as shown in ...of full-hiding security described in ...weak security but ... See full document

... the full security of an (attribute-hiding) IPE or ABE system is the dual system encryption by Waters [21] and its extension ...the security proof, provided that the adversary ... See full document

... basic security (a) protects privacy for both data-providers and data-retrievers from dishonest users, ...The security condition (b) assures no information leakage to the server administrator ... See full document

... of security can be ...on attribute-based encryption [25, 16], progressively evolving to support more expressive classes of functions, leading to the state of art works that are now able to support ... See full document

... system encryption methodology has previously been implemented both in prime order bilinear groups ...and security proof in composite order groups, relying on a few instances of the general subgroup decision ... See full document

... functional encryption: We will use the first input coordinate to encrypt the description of the function and the second to encrypt the input, and provide a function key for the universal 2-input ...tion ... See full document

... the attribute-based encryption and managed by the server, so that the user can access the video data when the attribute of the user satisfies the attribute of the access policy specified in ... See full document

... Data hiding provides easy way of implementing the ...for hiding the data from hackers and sent to the destination ...data hiding and then encryption and vice-versa. In data hiding we ... See full document

... for inner-product function family (IP-FE), based on the Decisional Diffie-Hellman (DDH) assumption, but for the selective security model only: encryption queries are known in ...achieved ... See full document

... attribute must be satisfied by the user to decrypt the data which helps in high data security. This project is implemented by combining both the time and attribute factors by embedding the ... See full document

... the security and integrity of the data and the data of the users will be managed by the hybrid authority itself providing a more secure mechanism, reduce computational overhead, Authenticate Data Security, ... See full document

... attributes for each authority k, without specifiying which attributes. As opposed to this limitation, the multi-authority scheme proposed by Lewko et al. [13] supports any boolean access policy and does not require a ... See full document

... with encryption primitive. One could imagine trying to build an Attribute-Based version of one way function with encryption and then try to yield a CCA encryption from the resulting ...an ... See full document

... 3. Identity-Based Access Control: We consider both the computation on encrypted data aspect and the access control aspect of FE by letting users specify an identity in their ciphertext. The master authority gives ... See full document