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Reversible fast data outsourcing encapsulation method and device

A technology of data outsourcing and encapsulation methods, which is applied in the field of data processing and can solve problems such as inability to provide, filter, and security models that are not fully considered

Active Publication Date: 2019-10-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the attacker may know the data accidentally leaked by the targeted legitimate user
Such a dangerous real-world environment does not fully take into account all situations in the existing security model
And the existing protocol does not provide any mechanism to filter invalid encapsulation

Method used

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  • Reversible fast data outsourcing encapsulation method and device
  • Reversible fast data outsourcing encapsulation method and device
  • Reversible fast data outsourcing encapsulation method and device

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] Public cloud storage of outsourced electronic health records has significant advantages over traditional local storage and is a promising storage paradigm. A secure data encapsulation mechanism is proposed to enforce access control on outsourced EHR data. However, the existing encapsulation methods require high-cost asymmetric cryptographic methods that are linearly related to the size expressed by the adopted access control strategy. In addition, the existing solutions cannot detect and filter illegal encapsulation, so t...

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Abstract

The invention discloses a revocable quick data outsourcing packaging method and device. The method includes initiation of trust authority is performed; a data owner performs data packaging; an auditor performs package detection, calculates and checks whether three equations hold or not by adopting a chameleon hash function and outputs a result; a trust authority execution access authority is generated and an access certificate is output; the trust authority execution access authority is updated, the access authority is updated and the updated access certificate is released; the data owner executes data de-packaging and detects whether the access certificate is cancelled and calculates a de-packaging key and de-packages; a trust authority execution access authority cancel module cancels the access authority. The method realizes effective access control and protects the safety of electronic health cases stored in third party servers that are not completely trustful in the maximal degree, and saves the decryption cost of a mobile device.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a revocable and fast data outsourcing encapsulation method and device. Background technique [0002] Electronic health record (EHR) system is a promising health record management system. Compared with the traditional paper-based health record (PBHR) system, the EHR system brings additional advantages, such as: more flexible EHR storage, simpler EHR data management, better storage and recovery efficiency and a wider range of availability. Cloud storage can provide users with almost unlimited resources on-demand and at low cost, especially on public clouds. In this way, EHR can be outsourced to the public cloud, and medical staff can be freed from the work of setting up a professional EHR storage system and managing the large-scale EHR data they have. Users can easily access and share their EHR data through the public cloud. [0003] An important security consideration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/32H04L9/06H04L29/06
Inventor 刘建伟刘巍然陶芮
Owner BEIHANG UNIV
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