Get 1.5 STEEM by deciphering these coded messages!

(Updated 2018-08-06: Hive account@markgritter solved 4 additional puzzles!)
(Updated 2018-08-11: Updated links to point to new posts)

If you are good with computers, I suggest you try to decipher these puzzles I created a week ago.

Six of the eight puzzles have been solved as of today.

There is a total of 1.5 STEEM left to collect by solving puzzles 7 and 8.

You don't need to use a programming language to solve these, but some programming knowledge will help.

A small tip: By taking a look at the solutions, you should be able to decipher the rest of the puzzles with a little trial and error!

Good luck!

The puzzles can be found in this post and the solutions to solved puzzles are here.