2,516 research outputs found
A privacy-preserving, decentralized and functional Bitcoin e-voting protocol
Bitcoin, as a decentralized digital currency, has caused extensive research
interest. There are many studies based on related protocols on Bitcoin,
Bitcoin-based voting protocols also received attention in related literature.
In this paper, we propose a Bitcoin-based decentralized privacy-preserving
voting mechanism. It is assumed that there are n voters and m candidates. The
candidate who obtains t ballots can get x Bitcoins from each voter, namely nx
Bitcoins in total. We use a shuffling mechanism to protect voter's voting
privacy, at the same time, decentralized threshold signatures were used to
guarantee security and assign voting rights. The protocol can achieve
correctness, decentralization and privacy-preservings. By contrast with other
schemes, our protocol has a smaller number of transactions and can achieve a
more functional voting method.Comment: 5 pages;3 figures;Smartworld 201
Tree-level Split Helicity Amplitudes in Ambitwistor Space
We study all tree-level split helicity gluon amplitudes by using the recently
proposed BCFW recursion relation and Hodges diagrams in ambitwistor space. We
pick out the contributing diagrams and find that all of them can be divided
into triangles in a suitable way. We give the explicit expressions for all of
these amplitudes. As an example, we reproduce the six gluon split NMHV
amplitudes in momentum space.Comment: 20 pages, 16 figures; minor changes; clarifications added, 22 pages,
16 figure
M5-branes and Wilson Surfaces
We investigate the M5-brane description of the Wilson surface operators in
six-dimensional (2,0) superconformal field theory from AdS/CFT correspondence.
We consider the Wilson surface operators in high-dimensional representation,
whose description could be M5-brane string soliton solutions in background. We construct such string soliton solutions from the covariant
M5-brane equations of motion and discuss their properties. The supersymmetry
analysis shows that these solutions are half-BPS. We also discuss the subtle
issue on the boundary terms.Comment: 30 pages, Latex; little revision;Typos corrected, references added,
JHEP published versio
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