Chapter 14. Working Securely Across a Network

Secure communication is a concern, particularly when sharing confidential and vital information between people. Like in World War II, Winston Churchill, the prime minister of the United Kingdom, and Franklin D. Roosevelt, the president of the United States, shared critical military information, such as troop movements. To secure their voice conversations through the telephone, the SIGSALY (aka Green Hornet) was devised to encrypt and decrypt using cryptographic keys.

Nowadays, we cannot imagine anyone not worrying about network security. Even people who are not so technically savvy should be concerned. For instance, what if your bank's network is not secured and a hacker steals your bank account number ...

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