The true history of what cornrows really means and why it still exists as a hair style

Cornrows comes in many styles and it's done in most hair salons ,barbershops and even in people's homes but there's a true meaning why this style was created it was done to hide maps of locations to help our ancestors excape to and hold food such as corn and rice that's why they call it cornrows it helped them get around with out talking to each other cornrows have grown more today but there's always going to be the history surrounding cornrows  nowadays multiple cultures get  cornrows and wear ii in multiple colors  and Long hair down their backs or tied up