Question
1. In symmetric key encryptions, the same key is used for encryption and decryption operations. You used AND, OR, and XOR operators to encrypt plain-text
1. In symmetric key encryptions, the same key is used for encryption and decryption operations. You used AND, OR, and XOR operators to "encrypt" plain-text data (bitmap file). Prove that the XOR logic operation is symmetrical, meaning that Operand B -used to encrypt the bitmap data- can be used to decrypt the encoded bitmap file. Prove this (1) mathematically (by using the truth table of the XOR operator) and (2) practicing on the Crypti tool. Send two screenshots for the proof (2) to your instructor; one showing the encryption and one showing the decryption. Note that you don't have to use the bitmap file and hexed.it in proof (2). You can use a random string and a random operand B. Also, show that AND and OR operators corrupt the original image because these operators are irreversible (lossy). Therefore, the AND/OR operations performed in this lab cannot be regarded as encoding, encryption, or anything similar by no means. Choose one of the operators and prove this by using the truth table (1) and practicing in Cryptii (2).
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