Electric Files needs to have Expiration Date for Use
There are an electric files like music, movie, drama with copyright, but they are free on the net.
They can't get a fee from an unreasonable trader. The copied electronic file is copied, too. This is a
problem. Then, there are some methods of solving these.
1.Streaming for an electric file
It is necessary to prohibit the preservation of the streaming file.
Present
user1
Recording PC, HDD recorder
internet
electric files
user2
upload Make copies and sell
Company sell
Get profit from user1 & user2 transfer
But not get from user3 & user4 user3
user4
* user2 can get a profit from user3 & user4
* Some people can get a profit at auction site, Why? They sell CD/DVD/Books...
But the original company doesn't get a profit from auction members. Why?
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Idea/Hint
user1
Recording PC, HDD recorder
internet But files delete after expire date or don't play
electric files