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Cipher, Plain text, CipherText
Plaintext is the input to an encryption algorithm. Ciphertext is the unreadable output of an encryption algorithm. Plain text means its text that hasn't been formatted (i.e., a plain text file)
Additional Reading
https://www.geeksforgeeks.org/transforming-a-plain-text-message-to-cipher-text/
https://en.wikipedia.org/wiki/Ciphertext
Suggested Video
Video #2: https://youtu.be/YqfAZbiZUEY