{TAIL ~ A digital signature} is preferably used for {HEAD ~ the cryptographic protection}, thereby digitally notarizing the encoded text stream 
{ TAIL ~ A digital signature } is preferably used for { HEAD ~ the cryptographic protection } , thereby digitally notarizing the encoded text stream
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH