COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK TOPOLOGIES AND PROTOCOLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A secret code used to keep data safe
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A key which is applied to data to scramble it (a)
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A set of numbers used to replace letters in data that is transmitted
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A message that is kept secret
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Detailed explanation-1: -Encryption uses complex mathematical algorithms and digital keys to encrypt data. An encryption algorithm (cipher) and an encryption key encode data into ciphertext. Once the ciphertext is transmitted to the recipient, the same or different key (cipher) is used to decode the ciphertext back into the original value.
Detailed explanation-2: -An encryption key is typically a random string of bits generated specifically to scramble and unscramble data. Encryption keys are created with algorithms designed to ensure that each key is unique and unpredictable. The longer the key constructed this way, the harder it is to break the encryption code.
Detailed explanation-3: -In which of the following encryption key is used to encrypt and decrypt the data? Explanation: In public-key (also known as asymmetric-key) encryption techniques, there are two different keys, the public key and the private key, used to encrypt and decrypt the data.
Detailed explanation-4: -Symmetric encryption uses one key to encrypt and decrypt. If you encrypt a zip file, and then decrypt with the same key, you are using symmetric encryption. Symmetric encryption is also called “secret key” encryption, as the key must be kept secret from third parties.