From the article: >Randomly generating an existing key is essentially impossible. If all 7 billion people on the planet generated a million keys per second for

From the article: >Randomly generating an existing key is essentially impossible. If all 7 billion people on the planet generated a million keys per second for a century, a year later they would have on the order of 1025 new keys - the probability of any of those matching a previously-used key is far less than the probability of winning a lottery jackpot every day for three years. In other words, it’s impossible to “get lucky” and generate a duplicate key even if you have all the computational power on Earth and try for more than the average human lifespan.