On optimal multiversion access structures

1993 ◽  
pp. 123-141 ◽  
Author(s):  
Bruno Becker ◽  
Stephan Gschwind ◽  
Thomas Ohler ◽  
Bernhard Seeger ◽  
Peter Widmayer
Keyword(s):  
Access Structures

Quantum secret sharing for general access structures based on multiparticle entanglements

2013 ◽  
Vol 13 (2) ◽  
pp. 429-443 ◽  
Author(s):  
Ming-Ming Wang ◽  
Xiu-Bo Chen ◽  
Yi-Xian Yang
Keyword(s):  
Secret Sharing ◽  
Quantum Secret Sharing ◽  
Access Structures

scholarly journals Secret Sharing Schemes on Sparse Homogeneous Access Structures with Rank Three

10.37236/1825 ◽  
2004 ◽  
Vol 11 (1) ◽  
Author(s):  
Jaume Martí-Farré ◽  
Carles Padró
Keyword(s):  
Secret Sharing ◽  
Access Structure ◽  
Open Problems ◽  
Access Structures ◽  
The Family ◽  
Ideal Access Structures ◽  
Optimal Information ◽  
Made In ◽  
The Ideal

One of the main open problems in secret sharing is the characterization of the ideal access structures. This problem has been studied for several families of access structures with similar results. Namely, in all these families, the ideal access structures coincide with the vector space ones and, besides, the optimal information rate of a non-ideal access structure is at most $2/3$. An access structure is said to be $r$-homogeneous if there are exactly $r$ participants in every minimal qualified subset. A first approach to the characterization of the ideal $3$-homogeneous access structures is made in this paper. We show that the results in the previously studied families can not be directly generalized to this one. Nevertheless, we prove that the equivalences above apply to the family of the sparse $3$-homogeneous access structures, that is, those in which any subset of four participants contains at most two minimal qualified subsets. Besides, we give a complete description of the ideal sparse $3$-homogeneous access structures.

Efficient Attribute-Based Data Sharing Scheme with Hidden Access Structures

2019 ◽  
Vol 62 (12) ◽  
pp. 1748-1760 ◽  
Author(s):  
Yang Chen ◽  
Wenmin Li ◽  
Fei Gao ◽  
Wei Yin ◽  
Kaitai Liang ◽  
...  
Keyword(s):  
Access Control ◽  
Data Sharing ◽  
Inner Product ◽  
Access Structure ◽  
Online Data ◽  
Fine Grained ◽  
Access Structures ◽  
Attribute Based Encryption ◽  
And Performance ◽  
Ciphertext Policy

AbstractOnline data sharing has become a research hotspot while cloud computing is getting more and more popular. As a promising encryption technique to guarantee the security shared data and to realize flexible fine-grained access control, ciphertext-policy attribute-based encryption (CP-ABE) has drawn wide attentions. However, there is a drawback preventing CP-ABE from being applied to cloud applications. In CP-ABE, the access structure is included in the ciphertext, and it may disclose user’s privacy. In this paper, we find a more efficient method to connect ABE with inner product encryption and adopt several techniques to ensure the expressiveness of access structure, the efficiency and security of our scheme. We are the first to present a secure, efficient fine-grained access control scheme with hidden access structure, the access structure can be expressed as AND-gates on multi-valued attributes with wildcard. We conceal the entire attribute instead of only its values in the access structure. Besides, our scheme has obvious advantages in efficiency compared with related schemes. Our scheme can make data sharing secure and efficient, which can be verified from the analysis of security and performance.

scholarly journals Visual Cryptography for General Access Structures

1996 ◽  
Vol 129 (2) ◽  
pp. 86-106 ◽  
Author(s):  
Giuseppe Ateniese ◽  
Carlo Blundo ◽  
Alfredo De Santis ◽  
Douglas R. Stinson
Keyword(s):  
Visual Cryptography ◽  
Access Structures

scholarly journals Access Structures of Elliptic Secret Sharing Schemes

2008 ◽  
Vol 54 (2) ◽  
pp. 850-852 ◽  
Author(s):  
Hao Chen ◽  
San Ling ◽  
Chaoping Xing
Keyword(s):  
Secret Sharing ◽  
Secret Sharing Schemes ◽  
Access Structures
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