This is a theoretical question.
I have a idea, encryption by bit rotation in byte. Do not know if something like this already exists.
General concept is:
First n bytes is rotated to left or right by value between 1 and 7. Next n bytes are rotated to left or right by different value between 1 and 7. While keeping n between 1 and 10 bytes. and so on till the end of the of encrypted file.
The value of n and a list of shift values for each block make up the key.
My intent is to use this for a symmetric encryption between computers over the internet.
How breakable/hackable should something like this be?