Security tutorial - the best I saw so far
I am amazed by how detailed and interesting this tutorial is.
Once you start reading it is very hard to stop.
It is not only cryptocoins, but all is very much related to the topic
I have to say that is PROBABLY THE BEST COCKTAIL of USEFULL INFORMATION i saw on the internet this year.
Also I suggest to take a look at this sick speech of Mr. Jacob Applebaum