110 another problem is that the seller can deny the accuracy of the p3p policy claiming that it was altered by the e marketplace the buyer or a third party e g a hacker also as described above an ssl certificate 152 can be sent from seller 110 to the e marketplace 100 via the network connection 102 along with the p3p policy 150 this will confirm to the e marketplace and to the client browser of seller 110 that the e marketplace is u201c talking u201d to the client browser of seller 110 and that the data sent by seller 110 was not tampered with in transit however the e marketplace may be communicating with buyer 120 over a different ssl connection and thus present its own ssl certificate ssl u2032 to buyer 120 when transmitting the modified p3p policy 150 u2032 thus the prior art does not allow a participant communicating through a middle person the e marketplace to confirm that a third party with which they are doing business is the originator of the p3p policy that purports to be theirs fig2 illustrates the present invention applied to the e marketplace depicted in fig1 in contrast to the naked p3p or.