The Long and Winding History of Encryption
Never in history have more people had access to advanced encryption in their homes, offices, and pockets. The most basic online transactions and communications that Internet users conduct every day are thoroughly encrypted in transit, and are undecipherable without proper keys.
The democratization of encryption is a recent phenomenon: Only since the 1990s has computer encryption been open and freely available. But humans have been communicating with codes and ciphers for thousands of years, using rudimentary encryption methods to protect trade secrets and military orders, or simply to keep information private from neighbors.
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