▁The ▁Lam port ▁signature ▁scheme ▁is ▁a ▁digital ▁signature ▁system ▁that ▁re lies ▁on ▁maintain ing ▁two ▁sets ▁of ▁secret ▁data ▁packets , ▁publishing ▁ver ifiable ▁hash es ▁of ▁the ▁data ▁packets , ▁and ▁then ▁select ively ▁reve aling ▁partial ▁secret ▁data ▁packets ▁in ▁a ▁manner ▁that ▁con forms ▁specifically ▁to ▁the ▁data ▁to ▁be ▁signed . ▁In ▁this ▁way , ▁the ▁prior ▁public ▁commit ment ▁to ▁the ▁secret ▁values ▁becomes ▁a ▁critical ▁part ▁of ▁the ▁function ing ▁of ▁the ▁system . ▁ ▁Because ▁the ▁Lam port ▁signature ▁system ▁cannot ▁be ▁used ▁more ▁than ▁once ▁( see ▁the ▁relevant ▁article ▁for ▁details ), ▁a ▁system ▁to ▁combine ▁many ▁Lam port ▁Key - sets ▁under ▁a ▁single ▁public ▁value ▁that ▁can ▁be ▁tied ▁to ▁a ▁person ▁and ▁verified ▁by ▁others ▁was ▁developed . ▁This ▁system ▁uses ▁trees ▁of ▁hash es ▁to ▁compress ▁many ▁published ▁l am port - key - commit ments ▁sets ▁into ▁a ▁single ▁hash ▁value ▁that ▁can ▁be ▁associated ▁with ▁the ▁pros pective ▁author ▁of ▁later ▁verified ▁data . ▁ ▁Ver ifiable ▁secret ▁sharing ▁ ▁Another ▁important ▁application ▁of ▁commit ments ▁is ▁in ▁ver ifiable ▁secret ▁sharing , ▁a ▁critical ▁building ▁block ▁of ▁secure ▁multip art y ▁computation . ▁In ▁a ▁secret ▁sharing ▁scheme , ▁each ▁of ▁several ▁parties ▁receive ▁" sh ares " ▁of ▁a ▁value ▁that ▁is ▁meant ▁to ▁be ▁hidden ▁from ▁everyone . ▁If ▁enough ▁parties ▁get ▁together , ▁their ▁shares ▁can ▁be ▁used ▁to ▁re construct ▁the ▁secret , ▁but ▁even ▁a ▁mal icious ▁cab al ▁of