COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK SECURITY AND CYBERSECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a person who makes up secret codes
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an algorithm that is used to scramble text so that it can be passed in secret
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a lock that can be used to lock a message in a lock box
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any puzzle, such as a crossword or Sudoku puzzle
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Detailed explanation-1: -Ciphertext is created through encryption algorithms, which are mathematical formulas that scramble the original text in a specific way. Encryption algorithms can be divided into two main categories: symmetric and asymmetric encryption. Symmetric encryption uses the same secret key for both encryption and decryption.
Detailed explanation-2: -What is a cipher? In cryptology, the discipline concerned with the study of cryptographic algorithms, a cipher is an algorithm for encrypting and decrypting data. Symmetric key encryption, also called secret key encryption, depends on the use of ciphers, which operate symmetrically.
Detailed explanation-3: -Ciphers are algorithms, more specifically they’re a set of steps for performing a cryptographic function – it can be encryption, decryption, hashing or digital signatures.
Detailed explanation-4: -A cipher algorithm is a mathematical formula designed specifically to obscure the value and content of data. Most valuable cipher algorithms use a key as part of the formula. This key is used to encrypt the data, and either that key or a complementary key is needed to decrypt the data back to a useful form.