A simple symmetric cryptographic algorithm designed and developed without a specific purpose.
Algorithm operations:
last_key = sha512(key)
result += (512 bit) part of text ^(xor) last_key
last_key = sha512(last_key)
result += (512 bit) part of text ^(xor) last_key
...
until the text ends.
The process repeats for ((len(text) * len(key)) % 16) times. (if result comes 0 it becomes 3)