A method and system for secure distribution of digital media files
including text, video, audio and combinations of these is described. A
particular embodiment involves the distribution of audio tiles
(particularly music) which are presently being widely distributed over
the internet without compensating the various rights holders. In some
embodiments, audio content (except for an optional preview section) is
encrypted in a single executable file, allowing it to be freely
distributed. When consumers want to access the encrypted portion of the
file, a decryption key is obtained from a remote server, but because the
file includes an integral decryption engine, a decrypted copy of the file
never appears on the client side. Thus, there is no unprotected copy that
the consumer can illegally distribute. The disclosure also describes
other advantageous techniques, such as bonding the decryption key to the
consumer's computer, so it cannot be used by others.