Multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption

A KP-ABE, multi-institutional technology, applied to key distribution, can solve problems such as high computational overhead, performance bottleneck of single-institution attribute encryption scheme, inapplicability to low-configuration mobile devices, etc., and achieve the effect of reducing workload

Active Publication Date: 2017-03-08
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-organization KP-ABE method that supports pre-encryption and outsourced decryption, aiming at solving the problem that existing attribute encryption sch

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  • Multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption
  • Multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption
  • Multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption

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[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0048] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Such as figure 1 As shown, the multi-agency KP-ABE method supporting pre-encryption and outsourced decryption provided by the embodiment of the present invention includes the following steps:

[0050] S101: During the encryption process, the pre-calculation part is processed through offline operations to reduce the amount of encryption calculation on the mobile device;

[0051] S102: In the decryption process, the user first generates a conversion key locally, and performs semi-de...

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Abstract

The invention discloses a multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption. The multi-mechanism KP-ABE method supporting pre-encryption and outsourcing decryption comprises dividing each of the data encryption process and the ciphertext decryption process into two parts: pre-computation and mobile equipment computation; in the data encryption process, the pre-computation part is processed through an offline operation, and the encryption computation quantity on the mobile equipment is reduced; in the ciphertext decryption process, a user firstly generates a transformation key at local, and processes majority computation through a decryption server to perform the half-decryption; and the user can perform the final decryption computation on any equipment. Through the adoption of the method disclosed by the invention, multiple authorities are commonly in charge of user attribution and key distribution, the encryption and decryption computation expenditures at a user side are effectively lowered, so that the attribute-based encryption scheme can be suitable for the mobile phone and like mobile equipment in low configuration.

Description

technical field [0001] The invention belongs to the technical field of data encryption, in particular to a multi-organization KP-ABE method supporting pre-encryption and outsourcing decryption. Background technique [0002] With the rapid development of smart phones. More and more users store personal data information in the cloud through the cloud application of the mobile phone, and store and share it through the mobile cloud. However, as an open and distributed environment, the mobile cloud cannot guarantee the confidentiality and security of data, and cloud service providers may also spy on user data out of curiosity or commercial interests, or even leak user data. Therefore, how to realize the safe sharing of data has also become a major challenge for the development of cloud computing. Although the traditional public key cryptography can realize the secure sharing of data, it only supports one-to-one encryption and cannot realize flexible access control. At present,...

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Application Information

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IPC IPC(8): H04L9/08
CPCH04L9/083H04L9/0861H04L9/088
Inventor 李学俊吕茂旭杨诗雨
Owner XIDIAN UNIV
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