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Anti-leakage method, anti-leakage device, and encryption device

An anti-leakage and confidential information technology, applied in the blockchain field, can solve the problems of inability to trace the leaker, announcement of leakage of confidential information, and low cost of leaking, so as to improve security and reliability, ensure security, and reduce leaks. effect of risk

Active Publication Date: 2022-07-29
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the present invention provides an anti-leakage method, an anti-leakage device, and an encryption device to solve the problem of leaking publicized confidential information in the prior art due to the low cost of leaking secrets in the blockchain network and the inability to track down the leaker. question

Method used

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  • Anti-leakage method, anti-leakage device, and encryption device
  • Anti-leakage method, anti-leakage device, and encryption device
  • Anti-leakage method, anti-leakage device, and encryption device

Examples

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Embodiment 1

[0032] An embodiment of the present application provides a leak prevention method, which can be applied to a leak prevention device, and the device can be placed in a second member node. figure 1 It is a flow chart of the anti-leakage method in this embodiment, including:

[0033] Step 110: Obtain the confidential information published by the first member node from the blockchain network.

[0034]Among them, the secret information is the information obtained by the first member node encrypting the plaintext information according to the attribute public key, the attribute public key is the secret key generated by the first member node according to the system public key and N attribute features in the attribute set, and the attribute set Including the second attribute feature, N is a positive integer greater than or equal to 1. For example, when N is equal to 3, the attribute set will include attribute characteristics of three member nodes, and all three member nodes have the r...

Embodiment 2

[0051] The embodiment of the present application provides an anti-leakage method, which can be applied to an encryption device in a blockchain network, and the device can be placed in a first member node. figure 2 It is a flow chart of the anti-leakage method in this embodiment, including:

[0052] Step 210: Generate an attribute public key according to the system public key and the N attribute features in the attribute set.

[0053] The attribute set includes the second attribute feature of the second member node, and N is a positive integer greater than or equal to 1.

[0054] It should be noted that the attribute set can also include the attribute private keys of other multiple member nodes. If the first member node wants multiple member nodes to view the confidential information released by it, when generating the attribute public key, it will It can put the attribute characteristics of its desired member nodes into the attribute collection. For example, if the first me...

Embodiment 3

[0063] image 3 This is a schematic structural diagram of an anti-leakage device provided in an embodiment of the present application. For the specific implementation of the device, reference may be made to the relevant description of the first embodiment, and repeated details will not be repeated. It should be noted that the specific implementation of the device in this embodiment is not limited to the above embodiments, and other unexplained embodiments are also within the protection scope of the device.

[0064] like image 3 As shown in the figure, the anti-leakage device specifically includes: an obtaining module 301 is used to obtain the confidential information issued by the first member node from the blockchain network, wherein the confidential information is that the first member node encrypts the plaintext information according to the attribute public key The obtained information, the attribute public key is the secret key generated by the first member node accordin...

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PUM

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Abstract

The invention discloses an anti-leakage method, an anti-leakage device and an encryption device. The method includes: from a blockchain network, obtaining confidential information issued by a first member node, wherein the confidential information is information obtained by the first member node encrypting plaintext information according to an attribute public key, and the attribute public key is the first member node The secret key generated according to the system public key and N attribute features in the attribute set, the attribute set includes the second attribute feature, and N is a positive integer greater than or equal to 1; decrypt the confidential information according to its own second attribute private key, Obtain first information, where the first information includes plaintext information and a watermark identifier. Prevent the disclosure of plaintext information, and at the same time, trace the specific leaker through the watermark, reduce the risk of leaks, ensure the security of confidential information, and improve the security and reliability of the blockchain network.

Description

technical field [0001] The present invention relates to the technical field of blockchain, in particular to an anti-leakage method, an anti-leakage device, and an encryption device. Background technique [0002] Attribute-Based Encryption (ABE) scheme is regarded as the most promising encryption primitive that supports fine-grained access. The biggest difference from public key encryption scheme is that ABE implements one-to-many encryption and decryption . The ABE scheme does not need to be like identity encryption. Each encryption must know the recipient's identity information. In the ABE scheme, the identity is regarded as a series of attributes. When the attributes owned by the user exceed the preset threshold described by the encryptor, the user can decrypt. But this kind of scheme based on preset thresholds is not universal, because it cannot express a universal situation semantically. ABE has two types: Key Policy AttributeBased Encryption (KP-ABE) and Ciphertext P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40
CPCH04L63/0442H04L2209/608H04L2209/42H04L2463/101H04L9/50
Inventor 田新雪肖征荣马书惠杨子文董慧
Owner CHINA UNITED NETWORK COMM GRP CO LTD