We further extend our mas construction to nonmonotone access structure nonmas in order to support negative attributes. Decentralized attributebased encryption, key policy, collusion attack, dbdh assumption. In this paper, we propose a privacypreserving decentralized keypolicy abe scheme where each authority can issue secret keys to a. Decentralized ciphertextpolicy attributebased encryption. Such an abe scheme can eliminate the burden of heavy communication and collaborative computation in the setup phase of multiauthority abe schemes, thus is considered. In the proposed scheme, each authority can join or leave the system randomly without reinitializing the system,and issue secretpublic keys to user. A privacypreserving decentralized ciphertextpolicy attributebased encryption cpabe scheme is a variant of the multiauthority attributebased encryption schemes where it requires neither a central authority nor cooperation among authorities for issuing secret keys. Novel secure privacypreserving decentralized attribute. Security analysis of a privacypreserving decentralized.
In this paper, we propose a privacypreserving decentralized keypolicy attributebased encryption scheme. Iciss 2015 proceedings of the 11th international conference on information systems security volume 9478 pages 521531. In this paper, we propose a privacypreserving decentralized keypolicy abe scheme where each authority can issue secret keys to a user independently without knowing anything about his gid. We further extend our mas construction to nonmonotone access structure nonmas in. But most of the available are shown there are security vulnerabilities.
Decentralized attributebased encryption abe is a variant of multiauthority based abe whereby any attribute authority aa can. In order to share data according to a policy without prior knowledge of who will be receiving them, sahai and waters extended identitybased encryption ibe 1 3 and introduced the attributebased encryption mechanism 4. User collusion avoidance scheme for privacypreserving decentralized keypolicy attributebased encryption. Decentralized attributebased encryption dabe is an efficient multiauthority attributebased encryption system. Privacypreserving decentralized key policy attribute. Based on the proposals of lewko and waters, we remove the need of a random oracle and replace it with a concrete function h mapping identities to group elements. Decentralized attributebased encryption technique is a variant of multiple authority based attributebased encryption whereby any attribute authority can independently join and leave the system. To achieve this, encryption schemes can be employed to protect the con. In the proposed abe system, the ciphertext is labeled with a set of attributes, a central authority ca issues the private keys to each user corresponding to his or her attributes. User collusion avoidance scheme for privacypreserving decentralized keypolicy attributebased encryption y rahulamathavan, s veluru, j han, f li, m rajarajan, r lu ieee transactions on computers 65 9, 29392946, 2015. There have been several efforts to propose decentralized abe schemes in. Decentralized attributebased encryption abe is a variant of a multiauthority abe scheme where each authority can issue secret keys to the user independently without any cooperation and a central authority. There are two variants of abe ciphertext policy attribute based encryption cpabe2 and key policy attribute based encryption kp.
User collusion avoidance scheme for privacypreserving decentralized keypolicy attributebased encryption abstract. In this paper, we propose a privacypreserving decentralized cpabe ppdcpabe scheme where the central authority is not required, namely each authority can. In this paper, we propose a privacypreserving decentralized keypolicy abe scheme where each authority can issue secret keys to a user independently without. In keypolicy attribute based encryption, ciphertexts are associated with sets of descriptive attributes, and users keys are associated with policies the reverse of. Privacypreserving decentralized keypolicy attribute. Decentralized attributebased encryption technique is a variant of multiple authority based attributebased encryption whereby any attribute authority can independently join and leave the system without collaborating with the existing attribute authorities. This is in contrast to the previous constructions, where multiple authorities must be online and setup the system interactively, which is impractical. Secure and efficient audit service for data integrity in. In a decentralized attributebased encryption abe system. In a traditional attributebased encryption abe system, there is only one central authority who generates and hence knows the secret keys of all users, this problem is known as the key escrow problem. Privacy preserving decentralized key policy attribute. Since the introduction of attributebased encryption, several works 8, 30, 43, 29, 23, 53, 21, 22, 37 have proposed di erent abe systems and applications. To make multiauthority abe schemes collusionresistant, a user in the system must be tied with a globally verifiable identifier gid. Security analysis of a privacypreserving decentralized keypolicy attributebased encryption scheme.
However, after carefully revisiting the scheme, we conclude that their scheme cannot. A novel privacypreserving decentralized ciphertextpolicy. In this paper, we propose a privacypreserving decentralized key. Privacypreserving decentralized abe for secure sharing of. Ltd we are ready to provide guidance to successfully complete your projects and also download the abstract, base paper from our web. Abstract in attributebased encryption abe scheme, attributes play a crucial role.
Decentralized attributebased encryption abe is a variant of multiauthority based abe whereby any attribute authority aa can independently join and leave the system without collaborating with the existing aas. In an open communication environment, such as the internet, sensitive data must be encrypted prior to being transmitted. Parallel and distributed systems, ieee transactions on 20. Privacypreserving attribute based searchable encryption. Therefore, constructing a decentralized abe scheme with privacypreserving remains a challenging research problem. Arunkumar published on 20190405 download full article with reference data and citations. An abe scheme which can deal with the aforementioned problem is socalled a decentralized or multiauthority abe scheme. Attributes have been utilized to generate a public key for encrypting data and have been used as an access policy to control users access. User collusion avoidance scheme for privacypreserving. Attributebased encryption abe is a new cryptographic primitive which provides a promising tool for addressing the problem of secure and finegrained data sharing and decentralized access control. Collusion attack on decentralized keypolicy attributebased encryption scheme. We present an efficient decentralized attributebased encryption abe that supports any monotone access structure mas with faster decryption capability in the keypolicy setting. Secure and efficient audit service for data integrity in cloud storage written by t. Cipherpolicy attributebased encryption cpabe isa more e.
A privacypreserving decentralized ciphertextpolicy attributebased encryption cpabe scheme is a variant of the multiauthority attributebased encryption schemes where it requires neither a. Sahai and waters 1 gave a solution to this issue by presenting attribute. The access policy can be divided as either keypolicy or cipher textpolicy. In almost all abe proposals, private keys were issued by one central authority that would need to be in a position to verify all the attributes or credentials it issued for each user in the. In a decentralized attributebased encryption abe system, any party can act as an authority by creating a public key and issuing private keys to different users that reflect their attributes without any collaboration. In this paper, in order to achieve the secure sharing of the phr data in cloud storage, we propose a novel privacypreserving decentralized abe scheme with policy hiding and gid hiding. Cipherpolicy attributebased encryption cpabe is a more efficient and flexible encryption system as the encryptor can control the access structure when encrypting a message. The scheme preserves the user privacy when users interact with multiple authorities to obtain decryption keys while mitigating the wellknown user collusion security vulnerability. Privacypreserving decentralized keypolicy attributebased encryption abstract. Keypolicy attributebased encryption kpabe is an important class of abe, where cipher texts are labeled with sets of attributes and private keys are associated with access.
1128 761 746 1212 236 776 947 90 781 971 201 1056 654 815 132 639 901 219 97 1460 1022 539 264 205 1015 1336 1474 819