a one-way function is easy to do but very difficult to undo. In other words, two-way functions are reversible, but one-way functions are not reversible. Once again, the best way to illustrate a one-way function is in terms of an everyday activity. Mixing yellow and blue paint to make green paint is a one-way function because it is easy to mix the paint, but impossible to unmix it. Another one-way function is the cracking of an egg, because it is easy to crack an egg but impossible then to return the egg to its original condition.
