Answer:
it is used to generate something to XOR with the plaintext.
Explanation:
Some mode of operation only use an encryption function because it is used to generate something to XOR with the plaintext. There is no point decrypt the generated bytes. To decrypt the ciphertext, you just need the same stream of bytes.
Answer:
Synonym
Explanation:
I'm pretty sure it's either synonym or explanation, but if there isn't an explanation, it's almost always synonym... so... synonym is correct.
Answer:
ROM : Read Only Memory.
RAM : Random Ascess Memory.
1. the sender of the message
To put it in very simple terms, communication is the exchange of information. The goal of an effective communication is to have the message that is sent by an individual X (the sender) be clearly received by individual Y (the receiver). The sender composes the message and delivers it to the receiver. This can be done either in writing or orally. The receiver should be able to clearly understand the intent of the message.