[PDF] Top 20 Group Selection and Key Management Strategies for Ciphertext-Policy Attribute-Based Encryption

... same key generation of type D ...encrypting based on these user groups, revocation occurs by updating the groups to remove a ...user group, and because of this, they will not match up with the ... See full document

... Words: policy, fine grained access control, attribute based ...day attribute based encryption has paid a lot of ...allows encryption and decryption of data that depends on ... See full document

... access policy under which a ciphertext can be ...granted based on the functional role he/she assumes in an organization, where a role reduces to no more than a set of ...key encryption. ... See full document

... cryptographic key materials required by encryption or decryption is can be linear or sublinear depending on the number of ...public key size is O(N ) or O(N 1/2 ), where N is the number of users in ... See full document

... secret key by combining their secret ...secret key queries can be issued by the adversary A after the challenge ...the Key- Gen queries L 1 and L 2 such as (L 1 |= W ∗ ) ∧ (L 2 |= W ∗ ) and (L 1 ∪ ... See full document

... ensures ciphertext size to be linear in the size of formula other than all system attributes, enables us to relieve the communication cost incurred by re-encrypted ciphertext and re-encryption ... See full document

... Broadcast Encryption Transforming an ABE encryption scheme for using it in a broad- cast scenario is a natural question, as in practice, broadcasters are most of the time addressing sets of receivers ... See full document

... Dual-Policy Attribute Based Encryption (DP-ABE), proposed in 2009, is a combination of two variants, Ciphertext Policy-ABE (CP-ABE) and Key Policy-ABE (KP-ABE), ... See full document

... hierarchy attribute-centered encoding theme in cloud ...The ciphertext components involving attributes would be shared by technique of the ...each ciphertext storage and time rate of encoding is ... See full document

... public-key encryption can also be used in commit-and-reveal schemes in a distributed system to lock value in the commit ...bad ciphertext in the commit phase, the original random of them are ... See full document

... public key based on a set of attributes ω 0 , only if the sets ω and ω 0 overlap sufficiently as determined by a threshold value ...general policy to decide which attributes are required to decrypt a ... See full document

... uses attribute- based encryption to encrypt the stored ...however,the key management is very complicated and ...scheme based onTo reduce the cost, the users which have a limited ... See full document

... the attribute-authorities[2].We propose an attribute-based encryption scheme without the trusted authority, and an anonymous key issuing protocol which works for both existing schemes ... See full document

... compromised, key revocation or update for each attribute is necessary in order to make systems ...proxy encryption mechanism together with the CP-ABE algorithm. Attribute group keys are ... See full document

... are attribute authority, data owner, data user and cloud ...the attribute authority is to generate secret keys for users according to their attributes to decrypt ...public key and a master ...access ... See full document

... combines attribute based access control model with an expansion of ciphertext-policy attribute-set-based encryption (ASBE) and Hierarchical Attribute-based ... See full document

... of attribute sets used for encryption and has a large attribute ...system encryption approach, the scheme overcomes the main obstacle which the low amount of entropy provided by the short ... See full document

... An interesting direction of future research is to find other definitions of attributes for which rekey messages can be calculated more efficiently. For example, we may return to a tree-based setting, where ... See full document

... system encryption via predicate ...monotonic attribute-based ...Public Key Cryptography, volume 8383 of Lecture Notes in Computer Science, pages 275–292, Buenos Aires, Argentina, ... See full document

... challenge ciphertext. In prior KP-ABE schemes the challenge ciphertext was associated with a set S ∗ of ...each attribute was simply treated differently depending whether or not it was in S ∗ ... See full document