A Secret Sharing Method of Marine Remote Sensing Imagery with Dynamic Weighted Threshold

Abstract

The invention relates to an ocean remote sensing image secret sharing method based on a dynamical weighting threshold. The ocean remote sensing image secret sharing method based on the dynamical weighting threshold is characterized by comprising an initialization phase module, an image feature generation hash value module, a shadow information distribution module and a secret image restoration module. The method has the advantages that the method supports dynamic change of a participator, the redistribution of sub-secrets is not needed, so that the implementation cost is reduced; each sub-secret is stored by the participator, when an image is restored, the sub-secret held by each participator cannot be public, and the image can be restored through providing shadow information of the sub-secret, so that the reusability of the sub-secret is guaranteed; a bulletin board is introduced to release auxiliary information; the secret sharing with the weighted participators is realized based on a Chinese remainder theorem, and the shared sub-secrets are converted to a polynomial linear combination, so that the method can dynamically add or update the secrets, and the method has flexibility.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a method for secretly sharing marine remote sensing images with a dynamic weighted threshold. Background technique [0002] In the existing threshold multi-secret sharing scheme, there are problems such as the secret share of the participant is generated by the secret distributor, and when adding or deleting members, the system needs to re-allocate the secret share to all participants and other defects. Poor flexibility when changing dynamically. Existing schemes can solve the problem of new members joining, but face difficulties in dealing with the sobriety of old members leaving. If the company assigns each employee a sub-secret, which is used to share the secret in each project group that the employee participates in, and an employee withdraws from a project halfway, or resigns from the company, the company faces the problem of confidentiality, but it must Re-re...

AI Technical Summary

Problems solved by technology

However, this method cannot improve the communication efficiency of the sharing scheme, reduce the cost of key management, and deal with the flexibility of secrets and dynamic changes of participants.

[0006] Therefore, there is an urgent need for a secret sharing method that improves the communication efficiency of the sharing scheme, reduces the cost of key management and handles secrets, improves the flexibility of dynamic changes of participants, and distributes sub-secrets according to weights. see the report

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