▁compared ▁her ▁unf avor ably ▁to ▁the ▁senior ▁lady - in - wait ing ▁of ▁her ▁daughter - in - law ▁Joseph ine ▁of ▁Le uch ten berg ▁in ▁a ▁letter ▁to ▁her ▁sister ▁Jul ie ▁Cl ary ▁in ▁March ▁ 1 8 3 1 : ▁ ▁" I ▁am ▁sure ▁you ▁have ▁found ▁count ess ▁Pi per ▁to ▁be ▁very ▁pleasant ▁and ▁entertain ing ; ▁she ▁is ▁an ▁exception al ▁person ▁[ un ▁ph én ix ]. ▁José ph ine ▁is ▁luck y ▁to ▁be ▁given ▁her ▁as ▁a ▁d ame ▁d ' honneur , ▁my ▁own ▁is ▁an ▁ic icle !" ▁ ▁References ▁▁ ▁Category : 1 7 7 9 ▁birth s ▁Category : 1 8 5 8 ▁death s ▁Category : S wed ish ▁ladies - in - wait ing <0x0A> </s> ▁In ▁crypt ography , ▁a ▁related - key ▁attack ▁is ▁any ▁form ▁of ▁crypt analysis ▁where ▁the ▁attack er ▁can ▁observe ▁the ▁operation ▁of ▁a ▁ci pher ▁under ▁several ▁different ▁keys ▁whose ▁values ▁are ▁initially ▁unknown , ▁but ▁where ▁some ▁mathematical ▁relationship ▁connecting ▁the ▁keys ▁is ▁known ▁to ▁the ▁attack er . ▁For ▁example , ▁the ▁attack er ▁might ▁know ▁that ▁the ▁last ▁ 8 0 ▁bits ▁of ▁the ▁keys ▁are ▁always ▁the ▁same , ▁even ▁though ▁they ▁don ' t ▁know , ▁at ▁first , ▁what ▁the ▁bits ▁are . ▁This ▁appears , ▁at ▁first ▁glance , ▁to ▁be ▁an ▁un real istic ▁model ; ▁it ▁would ▁certainly ▁be ▁unlikely ▁that ▁an ▁attack er ▁could ▁persu ade