First use of an encryption technique

According to Official Guinness Records,

The Caesar cipher was first used during the Gaul War c. 50 BC. According to the biographer Suetonius, Julius Caesar employed this cipher during his military campaigns, the first recorded use of any encryption technique.
The cipher is fairly simple, and in this instance involved shifting each letter of the alphabet three places to the left to produce apparently meaningless groups of letters. The recipient of the cipher had merely to move each letter three places to the right to reveal the message from Caesar.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in France.

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