An exemplary digital rights management engine and related methods divides multimedia content into service level layers, encrypts at least some of {HEAD ~ the layers}, and offers access to the encrypted layers by {TAIL ~ permission} 
An exemplary digital rights management engine and related methods divides multimedia content into service level layers , encrypts at least some of { HEAD ~ the layers } , and offers access to the encrypted layers by { TAIL ~ permission }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL