▁appropriate ▁for ▁use ▁in ▁a ▁ke yst ream ▁generator . ▁ ▁There ▁are ▁other ▁issues ▁to ▁consider , ▁e . g . ▁whether ▁or ▁not ▁the ▁function ▁is ▁bal anced ▁- ▁whether ▁it ▁outputs ▁as ▁many ▁or ▁roughly ▁as ▁many ▁ 1 ' s ▁as ▁it ▁does ▁ 0 ' s ▁when ▁all ▁possible ▁inputs ▁are ▁considered . ▁ ▁Research ▁has ▁been ▁conducted ▁into ▁methods ▁for ▁easily ▁generating ▁Boolean ▁functions ▁of ▁a ▁given ▁size ▁which ▁are ▁guaranteed ▁to ▁have ▁at ▁least ▁some ▁particular ▁order ▁of ▁correlation ▁imm unity . ▁ ▁This ▁research ▁has ▁un cover ed ▁links ▁between ▁correlation ▁imm une ▁Boolean ▁functions ▁and ▁error ▁correct ing ▁codes . ▁ ▁See ▁also ▁▁ ▁Top ics ▁in ▁crypt ography ▁ ▁References ▁▁ ▁Bruce ▁Schne ier . ▁App lied ▁C rypt ography : ▁Pro tocol s , ▁Alg orithms ▁and ▁Source ▁Code ▁in ▁C , ▁Second ▁Edition . ▁John ▁W iley ▁& ▁S ons , ▁Inc . ▁ 1 9 9 6 . ▁. ▁Page ▁ 3 8 2 ▁of ▁section ▁ 1 6 . 4 : ▁Stream ▁Ci ph ers ▁Using ▁L FS R s . ▁ ▁External ▁links ▁ ▁The ▁Online ▁Database ▁of ▁Boolean ▁Function s ▁allows ▁visitors ▁to ▁search ▁a ▁database ▁of ▁Boolean ▁factors ▁in ▁several ▁ways , ▁including ▁by ▁correlation ▁imm unity . ▁ ▁Category : C rypt ographic ▁attacks <0x0A> </s> ▁The ▁Original ▁Ku ▁Kl ux ▁K lan ▁of ▁the ▁Confeder acy ▁was ▁a ▁K lan ▁fa ction ▁led ▁by ▁As a ▁Carter ▁in ▁the ▁late ▁ 1 9 5