▁Web ▁commerce ▁ ▁J WS ▁can ▁be ▁used ▁for ▁applications ▁in ▁which ▁digit ally ▁signed ▁information ▁must ▁be ▁sent ▁in ▁a ▁machine - read able ▁format , ▁such ▁as ▁e - commerce . ▁ ▁For ▁example , ▁say ▁a ▁user ▁named ▁Bob ▁is ▁brow sing ▁widget ▁prices ▁on ▁a ▁web ▁site ▁( widget s . com ), ▁and ▁wishes ▁to ▁get ▁a ▁quote ▁on ▁one ▁of ▁them . ▁ ▁Then ▁widget s . com ▁could ▁provide ▁Bob ▁with ▁a ▁J WS ▁object ▁containing ▁all ▁relevant ▁information ▁about ▁the ▁widget , ▁including ▁the ▁price , ▁then ▁sign ▁it ▁using ▁their ▁private ▁key . ▁ ▁Then ▁Bob ▁would ▁have ▁a ▁non - rep udi able ▁price ▁quote ▁for ▁the ▁product . ▁ ▁Access ▁to ▁third - party ▁resources ▁ ▁Maybe ▁Widget s . com ▁and ▁Widget Storage . com ▁have ▁a ▁deal ▁in ▁which ▁Widget Storage . com ▁will ▁accept ▁coup ons ▁from ▁Widget s . com ▁in ▁exchange ▁for ▁traffic . ▁ ▁Widget s . com ▁could ▁issue ▁J WS ▁giving ▁Bob ▁a ▁ 1 0 % ▁disc ount ▁on ▁the ▁Widget Storage . com ▁site . ▁ ▁Again , ▁because ▁the ▁data ▁is ▁signed , ▁Widget Storage ▁can ▁know ▁that ▁Widget s . com ▁em itted ▁this . ▁ ▁If ▁the ▁data ▁was ▁not ▁signed , ▁then ▁Bob ▁could ▁change ▁his ▁disc ount ▁to ▁ 5 0 % ▁and ▁no ▁one ▁could ▁know ▁just ▁from ▁looking ▁at ▁the ▁data . ▁ ▁Lim itations ▁ ▁J WS ▁is ▁one ▁of ▁the ▁standards ▁in ▁the