Selling educational material for 5 years, how to encrypt?

Question

Encryption

Good day toasters. At the moment I am in the 5th year and I am finishing my degree in Applied Informatics in Economics. for 5 years, a lot of useful information has accumulated on subjects, in addition to the books I downloaded, prepared articles and term papers, there are also programs written by me in C ++ with source code and much more that will help you easily study in my specialty. Over the past two years, a lot of guys and girls from junior years came up for one or another labs, reports and much more and were satisfied with the quality of the work performed. Since our subjects do not change over the years and the program remains the same, I thought about selling all this luggage before leaving. I want to put a price tag of 500 rubles. But how to make a sale in 1 day in order to get the most profit, and not so that 1 person buys and the whole group uses it.

Answer 1

Don't be greedy give away for free, I have always given away everything for free and I have no problems with karma, but you may have problems with this.
So the student often does not have money for food, and you still rob him of 500 rubles.

Answer 2

Let's start with the fact that for this you can get under the article, so all commercial cryptographers are swept away immediately (you will be handed over at the first request of the prosecutor's office).
Well, nothing prevents one student from buying a work, printing it and reselling it to everyone else.
In short, look for a normal job, not a scam.

Answer 3

no way. they are students, and therefore the feeling of mutual assistance is still alive

Answer 4

Two archives. One with a preview of some of the works and a list of the titles of all the works. The second archive with all the works to screw up. And auction them together.
The one who wins the auction - tell the password after payment