Extended weighted threshold ocean remote sensing image secret sharing scheme in cloud environment and method

Abstract

The invention relates to an extended weighted threshold ocean remote sensing image secret sharing scheme in a cloud environment and a method. The method comprises the steps that distribution of an o-mignotte module according to participant weights is constructed, o-mignotte sequences in pairwise coprime are constructed, and the number of digits of each secret segment is calculated; a blocking module of a sensitive area image determines the number of blocks of the image, and a Hash sequence of the image is calculated by use of a Hash algorithm based on a remote sensing image grayscale value; a remote sensing image secret sharing module embeds secret segments obtained through calculation into a selected host image, and a shadow image is obtained; and a remote sensing image secret restoration module selects the shadow image provided by any participant with a weight sum greater than or equal to a weight threshold for lossless restoration of an original secret image. The method has the advantages that each participant saves one secret share regardless of his / her weight, and finally while key management and usage are simplified, the transmission amount of secret information is reduced, and the security and flexibility of the scheme are improved.

Description

technical field [0001] The invention relates to the technical field of marine remote sensing images, in particular, a scheme and method for secret sharing of marine remote sensing images with extended weighted thresholds in a cloud environment. Background technique [0002] Ocean remote sensing imagery is a typical big data, which has the characteristics of large batch, large scale and high sensitivity. In practical applications, the information of ports, coastal areas and islands in marine remote sensing images is the core of image data. Therefore, the security of marine remote sensing images has guiding significance for marine environment monitoring, marine resource management, marine disaster early warning and rescue. Image secret sharing, as an important branch of secret sharing, makes the research on secret sharing of marine remote sensing images a hot spot. In real life, different participants have different roles and importance (for example, in a company, ordinary e...

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Problems solved by technology

[0004] The existing research on image encryption methods mainly solves the security problems in the centralized storage environment. In the open cloud storage environment, in view of the security issues of marine remote sensing images, the above-mentioned image encryption methods have certain deficiencies. Most of the existing research on weighted threshold secret sharing is to assign multiple secret shares to the privileged or based on the decomposition structure, resulting in problems such as low information utilization rate and large amount of calculation data.

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