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Function S-rough sets and security-authentication of hiding law[J]. SHI KaiQuan1,2 & ZHAO JianLi3 1 School of Mathematics and Computer Sciences, Longyan University, Longyan 364000, China;2 School of Mathematics and System Sciences, Shandong University, Jinan 250100, China;3 School of Mathematics Science, Liaocheng University, Liaocheng 252059, China.Science in China(Series F:Information Sciences). 2008(07)