An object of the invention is to provide a method of secret communication which is relatively simply and reliable in operations, but at the same time is difficult to discover or decipher.

FORBES: Hedy Lamarr, The Most Glamorous Geek Of All Time

U.S. Patent No. 2, 292, 387 for a "Secret Communication System" was issued to Hedy Kiesler Markey and George Antheil in 1942. (Markey was the surname of a husband she had divorced in 1940.) The frequency-hopping technology was not put to use in World War II, but it was employed in 1962 during the blockade of Cuba.

WSJ: Book Review: Hedy's Folly

The real secret to effective communication these days, says Groysberg, may be authenticity.

FORBES: Why CMOs Should Get Used to Less Control

The secret is the word "communication", I suppose.

BBC: News Online

Forbes recently named Johnson the Most Influential Athlete in the U.S. The secret, he says, is communication with his crew chief.

FORBES: NASCAR Driver Jimmie Johnson Reveals Secrets of Success

As it turns out, the secret to effectiveness and happiness at work might just be communication, friendship and social interaction.

CNN: Workplace happiness: What's the secret?