One or more crypto processing segments {HEAD ~ each} operate based on corresponding ones of the k key fragments to process a message in accordance with elliptic curve digital signature algorithm to produce {TAIL ~ a signed message} 
One or more crypto processing segments { HEAD ~ each } operate based on corresponding ones of the k key fragments to process a message in accordance with elliptic curve digital signature algorithm to produce { TAIL ~ a signed message }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL