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In this video, Mia Gil Epner, a Computer Science major at UC Berkeley working for the Department of Defense, discusses the importance of keeping private information secure on the internet. Although the internet is an open system where data is shared widely, individuals still exchange sensitive information, such as credit card numbers and passwords. To protect this data, encryption is used, which involves scrambling the original message to hide its content. Decryption, the reverse process, makes the message readable again. One of the earliest known methods of encryption is Caesar's cipher, named after Julius Caesar, who used it to safeguard his military commands from enemies.
