14 fouque p , pointcheval d . threshold cryptosystems secure against chosen - ciphertext attacks . in proc 虽然他们的新方案也克服了原有的缺点，但是效率比较低。
2.
( 2 ) base on the complete sample of 178 spiral galaxies in the virgo cluster given by fouque et al . ( 1990 ) , the sv orientation distribution of the spiral galaxies with known galactic inclinations is studied ( 2 )利用fouqueetal . ( 1990 )所得的带有倾角数据的完备的virgo团旋涡星系样本，对virgo团旋涡星系旋转矢量分布进行了统计分析。
