General access structure verifiable multi-secret sharing scheme based on bilinear mapping
A technique for bilinear mapping, access structure, applied in key distribution
Inactive Publication Date: 2021-08-10
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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However, the scheme is still essentially verified by using the bilinear nature of the bilinear map
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be emphasized that the specific embodiments here are only used to explain the present invention, not to limit the present invention.
[0029] figure 1 A flow chart of a verifiable multi-secret sharing scheme based on a general access structure of a bilinear map provided by an embodiment of the present invention, as shown in figure 1 As shown, a verifiable multi-secret sharing scheme based on a general access structure of a bilinear map, the specific steps are as follows:
[0030] (1) System initialization, G 1 add group for cycle, G 2 is the cyclic multiplication group, e:G 1 ×G 1 →G 2 For bilinear mapping, the access structure is Γ={Γ 1 ,Γ 2 ,…,Γ n}, the authorized subset is Where 1≤k≤n, 1≤i≤m;
[0031] (2) D selects the hash f...
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The invention discloses a general access structure verifiable multi-secret sharing scheme based on bilinear mapping, and belongs to the field of information security technology and application. A general access fabric based on bilinear mapping can verify that a multi-secret sharing scheme is directed towards certain practical application requirements, such as the access fabric needs to meet flexible variability. The invention provides a verifiable multi-secret sharing scheme of a general access structure based on bilinear mapping by combining the advantages of the existing scheme and using the property of bilinear mapping. According to the new scheme, a plurality of polynomials are constructed to meet the threshold values of the same weight set in different authorization subsets, a secret base m0 is obtained by exclusive or of public information Hk corresponding to the authorization subsets and information shared by the thresholds of the different weight sets, and a plurality of pieces of shared secret information are obtained by exclusive or of the secret base and the public information. According to the method, participant share verification is carried out by using bilinear properties of bilinear mapping; the secret information is constructed by secret-based XOR and is independent from each other, so that the shared secret information can be changed; dynamic adding and deleting of participants are achieved by changing a variable value of a double-variable one-way function and updating public information; and the change of the access structure is realized by updating the public information Hk of the authorized subset in the access structure, and the flexibility is realized.
Description
technical field [0001] The invention belongs to the field of information security technology and application, and uses the bilinear property of bilinear mapping to propose a verifiable multi-secret sharing scheme based on a general access structure of bilinear mapping. Background technique [0002] Secret sharing technology can well solve the problems of data distribution, storage and recovery of data information, and can provide security support for key management issues to ensure information security. Traditional secret sharing schemes include distributors and participants, which are not verifiable; the proposed sharing schemes based on bilinear mapping generally have the disadvantage of only sharing one secret information; the proposed general access structure sharing schemes do not Therefore, the verifiable multi-secret sharing scheme based on the bilinear map's general access structure has become a research hotspot of secret sharing. [0003] Israeli cryptographer Sham...
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Login to View More IPC IPC(8): H04L9/08
CPCH04L9/085
Inventor 潘榆杜伟章
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY