Secure broadcasting and multicasting

摘要

Techniques are presented for secure broadcasting and multicasting. Communications for multicasting and broadcasting are encrypted and decrypted using a secure communication key. The secure communication key is represented in a broadcast value that is sent to selected parties. The broadcast value represents the product of unique prime numbers and an additional number plus the secure communication key. Each party is represented by one of the unique prime numbers. Each party can acquire the secure communication key by dividing the broadcast value by its particular prime number to obtain a remainder, which is the secure communication key.