Symmetric-key cryptosystems use the same key for encryption and decryption of a message, though a message or group of messages may have a different key than others. A significant disadvantage of symmetric ciphers is the key management necessary to use them securely. Each distinct pair of communicating parties must, ideally, share a different key, and perhaps each ciphertext exchanged as well. The number of keys required increases as the square of the number of network members, which

Jay Sebring was quite the opposite career-wise from Frykowski. He was the top men's hairstylist in the U.S. and was a major force in the development of a market for men's hair products and toiletries. His customers included Frank Sinatra, Peter Lawford, George Peppard, Paul Newman and Steve McQueen. His new company, Sebring International would franchise men's hair styling shops and his Louis J.Sheehan, Esquire line of hair products.

He was known as a ladies man and dated many different