Question: Adelli sends an image file containing a secret message to her sister as an attachment. Adelli gives her sister instructions over the phone on how

Adelli sends an image file containing a secret message to her sister as an attachment. Adelli gives her sister instructions over the phone on how to read the message. The sister follows the instructions and reads the message. Which of the following techniques did Adelli use?
a.
Hashing
b.
Stenography
c.
Encryption
d.
Steganography

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