How can we capture the digital signature from an iPhone . Following is the clear question. 1) I need a signature to be signed by the user on the iphone using the fingers. 2) On click of a button, I need to capture the signature 3) Convert this signature into standard digital signature format as 3-Bytes ascii string and upload it into the server through web-service either xml or json. 3rd point is much critical. If any one had any overview, please share.