There is a small bit of memory that all programs on your computer share that isn’t protected in any way. If two misbehaving programs on your computer wanted to

There is a small bit of memory that all programs on your computer share that isn’t protected in any way. If two misbehaving programs on your computer wanted to communicate in a really really secret way, they could use it. If you don’t have misbehaving programs on your computer that want to secretly communicate than it doesn’t matter.