COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sender only used same key
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Receiver only used same key
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Sender and receiver use same key
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None of the above
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Detailed explanation-1: -In this type of cryptography both the parties (sender and receiver) use same key to encrypt and decrypt the message. A popular symmetric key algorithm is Data Encryption Standard (DES), there are also its modern variants such as Triple DES.
Detailed explanation-2: -Asymmetric encryption algorithms use two different keys for encryption and decryption. The key used for encryption is the public key, and the key used for decryption is the private key. Both the keys must belong to the receiver.
Detailed explanation-3: -In cryptography same secret key is used by the sender and the receiver.
Detailed explanation-4: -Private key encryption systems use a single key that is shared between the sender and the receiver. Both must have the key; the sender encrypts the message by using the key, and the receiver decrypts the message with the same key.