An Attribute-Based Hybrid Encryption Method with Traceable Leaked Keys

A hybrid encryption and traceable technology, applied in the field of cryptography in information security, can solve problems such as data insecurity, achieve the effects of improving system efficiency, saving storage space, and ensuring data security

Active Publication Date: 2017-04-05
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It is not foolproof to rely solely on traditional encryption methods to protect data. The attribute-based encryption method issues user private keys corresponding to the attribute set to decrypt files. Once the user's private key is leaked for some reason, the The data that can be decrypted by the private key is not safe

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  • An Attribute-Based Hybrid Encryption Method with Traceable Leaked Keys
  • An Attribute-Based Hybrid Encryption Method with Traceable Leaked Keys
  • An Attribute-Based Hybrid Encryption Method with Traceable Leaked Keys

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Embodiment Construction

[0124] The present invention is an attribute-based hybrid encryption method with traceable leaked keys. The method is implemented by five modules: a system initialization module, a user entry module, a document establishment module, a document access module and a digital forensics module. The whole system architecture diagram of the traceable attribute-based hybrid encryption method of the leaked key is shown in figure 1 As shown, the flowchart of the method of the present invention is shown in figure 2 As shown, combined with the flow diagram, the specific implementation steps of the method are introduced as follows:

[0125] The present invention is an attribute-based hybrid encryption method with traceable leakage keys. The method of the method is as follows:

[0126] Module 1: System initialization module:

[0127] Step 1: Trusted Authority (TA) enters the system security parameter λ and runs the algorithm Output two groups of prime order p And a bilinear mapping operation ...

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Abstract

Disclosed is an attribute-based hybrid encryption method capable of tracing a leaked secret key. The method comprises the following steps: a trusted authority: 1, inputting a coefficient lambda, and outputting a system parameter; 2, running a randomized number generation algorithm; 3, selecting one anti-bump Hash function, and calculating a Hash value; 4, running a fingerprint code generation algorithm GenFC; 5, calculating a bilinear pair exponentiation operation; 6, distributing a fingerprint code to a user, and specifying an attribute set S; 7, running the randomized number generation algorithm, multiplication and exponentiation operation; and 8, embedding the fingerprint code in a user private key; a data holder: 9, carrying out AES data encryption; 10, generating an access control matrix; 11, running an attribute-based hybrid encryption algorithm Encapsulate, and encrypting an AES session secret key; and 12, running a bilinear pair and multiplication and division operation to obtain a session secret key; a data user: 13, running an AES data decryption algorithm; and the trusted authority: 1*, searching for an adaptability code word; 2*, calculating pj and Z; and 3, calculating a weight sum, and outputting a set C.

Description

[0001] (1) Technical field: [0002] The invention relates to an attribute-based hybrid encryption method with traceable leaked keys, which can realize the security management of user keys in a cloud storage environment, and can effectively track users who leaked keys by using fingerprint code technology when data is illegally accessed Identity belongs to the field of cryptography in information security. [0003] (2) Technical background: [0004] With the concept of cloud computing, more and more computer users deliver data storage, information processing and other services to the existing network to obtain the required resources, such as hardware, platform, and software, in an on-demand and easily scalable manner Wait. Cloud storage is a kind of cloud computing service. Through cluster application, grid technology or distributed file system and other functions, a large number of different types of storage devices in the network are assembled through application software to work t...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L9/06H04L9/32H04L29/08G06F21/32
Inventor伍前红邓桦周云雅刘建伟秦波
OwnerBEIHANG UNIV