Dear 100 Hour Board,
From Coca-Cola Secret Formula,
According to the company, only two employees are privy to the complete formula at any given time and they are not permitted to travel together. When one dies, the other must choose a successor within the company and impart the secret to that person. The identity of the two employees in possession of the secret is itself a secret.Who knows who the two employees are?
-the secret is make a big deal about the secret
Dear Big Secret,
According to your explanation, at least those two employees at least know who one of them are, since they pass on the secret to each other. Also, I would imagine that there is a travel agent somewhere who is just bubbling with smugness.
Here is the original section from William Poundstone's book (cited in the Wikipedia article) published in 1985 which I looked at on Amazon, chapter 3:
Snopes actually does a pretty good job explaining all of this, too, just in case you're interested.