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Twenty-one benzoylated phloroglucinol derivatives bearing homoadamantyl frameworks were isolated from the aerial parts of Hypericum sampsonii, including two new ones named hyperisampsins N and O (1 and 2). The structures of 1 and 2 were elucidated by extensive NMR and mass spectrometric analyses. Their absolute configurations were further determined by using TDDFT ECD calculations. Compounds 2, 7,...
It is the first time to combine Chebyshev Polynomial with Elliptic Curve. In this paper it construct a Elliptic Curve Cryptosystem Algorithm based on Chebyshev Polynomial. This paper use the semi-groop Character of the Chebyshev and the character of the Elliptic Curve to make a Cryptosystem Algorithm in the Elliptic Curve. This Algorithm has solved the problem that it can't get inversion in the process...
Pseudo random number produced by Chebyshev polynomial, Simplifying the knapsack cryptosystem, At the same time combining knapsack cryptosystem and elliptic curve cryptosystem, A new elliptic curve cryptosystem is produced, Through the analysis of the algorithm, it is thought that the algorithm is simple and has high safety, the scheme is feasible.
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